You want to push a 71-kg box up a 16° ramp. The coefficient of kinetic friction between the ramp and the box is 0.23. With what magnitude force parallel to the ramp should you push on the box so that it moves up the ramp at a constant speed?

Answers

Answer 1

Answer:

345.60N

Explanation:

The magnitude of the force parallel to the ramp that will push the box up the ramp are the frictional force(Ff) and the moving force Fm

Total force = Ff + Fm

Ff = ηR

Ff = ηmgcosθ

Fm = Wsinθ

Fm = mgsinθ

Total force = ηmgcosθ + mgsinθ

Total force = mg(ηcosθ + sinθ)

Given

mass m = 71kg

acceleration due to gravity g = 9.8m/s²

angle of inclination θ = 16°

coefficient of friction η = 0.23

Substitute into the formula;

Total force = 71(9.8)(0.23cos16 + sin16)

Total force = 695.8(0.2211+0.2756)

Total force = 695.8(0.4967)

Total force = 345.60N

Hence the magnitude force parallel to the ramp that you should push on the box so that it moves up the ramp at a constant speed is 345.60N


Related Questions

I WILL GIVE BRAINLYIST
Which of the following types of stars had the smallest initial mass? (10 points)

Group of answer choices

Blue main sequence

Neutron star

Red supergiant

White dwarf

Answers

Answer:

White dwarf

Explanation:

A rightward force of 302 N is applied to a 28.6-kg crate to accelerate it across the floor. The force of friction between the crate and the floor is 210. Determine the net force acting on the create. Determine the acceleration of the crate.

Answers

Answer:

Net Force is 92N and acceleration is 3.22 m/s/s

Explanation:

Fnet = Net force

FR = Force of friction

m = mass

a = acceleration

Fnet = ma

Fnet = F - FR = 302 - 210 = 92N

F - FR = ma

302 - 210 = (28.6)a

a = 3.22 m/s/s

plz help me with question ;-;

Answers

Answer:

C

Explanation:

Question 6 of 10
What is the role of the commutator in a DC generator?
O A. It causes the magnetic fields of the permanent magnets to
reverse.
B. It causes the electric current to constantly reverse its direction.
C. It keeps the electric current flowing in one direction.
D. It keeps the magnetic fields of the permanent magnet steady.
SUBMI

Answers

Answer:

C. It keeps the electric current flowing in one direction.

Explanation:

just got it correct on my quiz.

The commutator in a DC generator keeps the electric current flowing in one direction option (C) is correct.

What is a DC generator?

A direct current generator's principal job is to transform mechanical energy into electricity. Internal combustion engines, water, gas, steam turbines, and even hand cranks are all sources of mechanical energy for DC generators.

The commutator in a DC generator converts the alternate current into the direct current.

Thus, the commutator in a DC generator keeps the electric current flowing in one direction option (C) is correct.

Learn more about the DC generator here:

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A cyclist acceleration from 0m/s to 8m/s in 3second. what is his acceleration?​

Answers

Answer:

2.66 m/s² .

Explanation:

Initial velocity , u = 0 m/s

Final Velocity , v = 8 m/s

Time Taken , t = 3 s

So , Acceleration = (v-u)/t = (8 m/s - 0 m/s) /3 sec . = 8/3 m/s² = 2.66 m/s²

A mover slides a refrigerator weighing 650 N at a constant velocity across the floor a distance of 8.1 m. The force of friction between the refrigerator and the floor is 230 N. How much work has been performed by the mover on the refrigerator

Answers

Answer:

The magnitude of the work performed by the mover is 1863 J.

Explanation:

The work can be found using the following equation:

[tex] W = F*d [/tex]

Where:

F: is the force

d: is the displacement = 8.1 m

First, we need to find the net force in the horizontal direction, as follows:

[tex] \Sigma F_{x} = ma = 0 [/tex]

a = 0 since the mover slides a refrigerator at a constant velocity.

[tex] F_{x} = F_{f} = -230 N [/tex]

[tex]F_{f}[/tex]: is the friction force.

Then, the work is:

[tex] W = F*d = -230 N*8.1 m = -1863 J [/tex]    

Therefore, the magnitude of the work performed by the mover is 1863 J.

     

I hope it helps you!                              

give two differences between visible light and infrared light​

Answers

Answer:

Explanation:

Visible light has a wavelength that ranges from 380 nm – 750 nm on the electromagnetic spectrum while infrared light is just beyond it, ranging from 700 nm – 1 mm, the start of the non-visible portion of the spectrum. As a result, infrared cannot be seen except with special equipment like a security camera

Visible light is the common lighting method and we see it all around us. It is used in homes, work areas, factory floors, parking lots, loading docks, etc. They are also used as warning systems and to provide lighting for CCTV cameras in public places. The presence of floodlights warns intruders that their actions are being monitored.

Infrared light, however, is used when the intention is to monitor intruders covertly. Without a bright light to warn them about the presence of security cameras, intruders no longer feel the need to avoid surveillance, leaving them exposed to the IR-illuminated cameras.

Answer:

1. For humans, we can only see visible light, but can't see infrared.

2. Infrared have longer wavelengths than visible light.

When velocity is graphed with respect to time, what does the area under
the line represent?

A) velocity

B) distance

C) acceleration

D) displacement


Answers

Answer:

the answer is D

Explanation:

Since the velocity of the object is the derivative of the position graph, the area under the line in the velocity vs. time graph is the displacement of the object.

The Answer

Is Displacement

PLEASE HELP (multiple choice)

Answers

I’m pretty sure you’re correct

A Chevy Camaro drives straight off the top level off a parking garage at 13 m/s. If the car landed 90 meters away from the base of the parking garage, how high (height) was the top level?

Answers

Answer:

H = 234.85m

Explanation:

Using the formula for calculating range to find the maximum height

Range R = U√2H/g

U is the speed = 13m/s

H is the max height

R is the distance covered in horizontal direction

g is the acceleration

Substitute the given values as shown;

90 = 13√2H/9.8

90/13 = √2H/9.8

6.923 = √2H/9.8

6.923² = 2H/9.8

2H = 6.923²  *  9.8

2H = 469.70

H = 469.70/2

H = 234.85m

Hence the top level was 234.85m high

. If the kinetic energy is given in units of
g.cm/swhat units must the slope have?
A. g.cm/s
B. 8 cm/s?
C. s.cm/g
D. s? /(g.cm)

Answers

B this is the correct answer

Assuming that the acceleration of an object due to gravity is ag = 10 m/s2, it is possible to find the distance an object falls when dropped by using the equation ay = \frac{1}{2} ag t2. Using this value for gravity, how far would an object drop after 5.0 s?
105 m
125 m
135 m
115 m

Answers

Answer:

125 m

Explanation:

i just did the edpuzzle

Please HELP...Count the number of elements in the following molecule: 3 C2(H6K5)2​

Answers

Answer:

3

Explanation:

The diagram shows that the boiling point of water is 100°C at a pressure of 1 atm.


Which change in the system would increase the boiling point?

A. Increasing the pressure

B. Removing the container's lid

C. Increasing the water's volume

D. Removing the flame.

Answers

Answer:

i think is a

Explanation:

Increasing the pressure would increase the boiling point of water at 100°C and at 1 atmospheres as increasing pressure will cause molecules to come close together and boil  at a higher temperature.

What is pressure?

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

Learn more  about pressure,here:

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Help me please help me it’s due today

Answers

I believe it’s parallel circuit. If one of the bulbs is removed then that bulb will be off but other bulb will remain lit.

But I’m case it’s series circuit then if one of the circuit is removed then all the bulbs will turn off because there is only one path for the current to flow

Answer:

Explanation:

A)  The function of a switch is to shut the circuit down. There is a current flow of zero. Press the switch again and the circuit works.

Answer: D

B) a. This is a parallel circuit. It is the way all house wiring works.

B) b. Nothing happens. The other two bulbs continue on as before until someone presses the switch.

Which force is always pulling but never pushes and is directly influenced by mass

Answers

Answer: I know when it comes to magnetic objects the magnet always pulls not push.

Answer:

i believe it is gravity

Explanation:

the gravitational force is a force that attracts any two objects with mass. it pulls things together does not pushes them.

(AKS 1c) A bowler rolls a bowling ball with a speed of 4 m/s. It took 2s to reach the pins at the end of the lane. What is the final speed if the ball accelerated at rate of - 1.2m/s2 ? 8 m/s O 1.6 m/s 2.8 m/s Om/s​z​

Answers

Answer:

B is the answer

Explanation:

When A is divided by 7x, it multiplies to0.81

I have no clue on how to do this

Answers

a)5m/s b)5

the 5 is because you add the seconds to get 8 seconds and then do the same with the distance to get 40. 40/8 = 5. speed = 5

Velocity = displacement/change in time

V = 40/8

I just realized how unorganised my math looks but I hope this is helpfull

Which is not a family of the periodic table?
O alkaline-earth metals
O anions
O halogens
O noble gases

Answers

Answer:

anions

Explanation:

The other are families of the periodic table.

An anion is a negatively charged ion.

Answer

Anion The electronic configuration of many ions is that of the closest noble gas to them in the periodic table.

Explanation

Alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table.

Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa)

Halogens The halogens, members of Group 17 of the periodic table, include the elements

Mark me as brainleist pls

A parallel-plate capacitor is constructed using adielectric material whose dielectric constant is 3.00 and whose dielectric strength is 2.00X108V/m. The desired capacitance is 0.250 μF, and the capacitor must withstand a maximum potential difference of 4.00 kV. Find the minimum area of the capacitor plates.

Answers

Answer:

A = 0.188 m²

Explanation:

First we find the distance between the plates by using the formula of electric field intensity:

E = ΔV/d

d = ΔV/E

where,

d = distance between plates = ?

ΔV = Potential Difference = 4 KV = 4000 V

E = Electric Field = 2 x 10⁸ V/m

Therefore,

d = 4000 V/(2 x 10⁸ V/m)

d = 2 x 10⁻⁵ m

Now, we find the Area of Plates by using formula of capacitance:

C = A∈₀∈r/d

where,

C = Capacitance = 0.25 μF = 0.25 x 10⁻⁶ F

A = Area of Plates = ?

∈₀ = Permittivity of free space = 8.85 x 10⁻¹² C/N.m²

∈r = Dielectric Constant = 3

Therefore,

0.25 x 10⁻⁶ F = A(8.85 x 10⁻¹² C/N.m²)(3)/(2 x 10⁻⁵ m)

A = (0.25 x 10⁻⁶ F)(2 x 10⁻⁵ m)/(3)(8.85 x 10⁻¹² C/N.m²)

A = 0.188 m²

A transverse and longitudinal wave combine to form what kind of wave?


a sound wave


a radio wave


an electromagentic wave


a surface wave

Answers

It is a surface wave
C. An electromagnetic wave

Bile is a compound that helps in the digestion of fat and eliminates waste products from the blood. True O False​

Answers

Answer:

That should be true because bile is ¨a bitter greenish-brown alkaline fluid that aids digestion and is secreted by the liver and stored in the gallbladder.¨

Explanation:

In zoes egg experiment which two forces are balanced to keep it from hitting the pan

Answers

Answer:

The forces of push and pull

Explanation:

In the egg drop experiment, the egg is balanced on top of a toilet paper tube and balanced on a pan. The pan itself is placed on top of a glass of water. When the experimenter uses his hands to push the pan, the force of gravity pulls the egg downwards making it move down, right into the glass of water.

So the two forces which are applied in opposite directions are;

1. The force of push applied horizontally by the hand when it pushes the pan away, and

2. The force of pull caused by gravity which makes the egg move vertically downwards.

Answer:

Forces of push and pull

Calculate the speed of a car that has traveled 300 miles in 6 hours.
50 miles per hour
25 miles per hour
50 miles per hour north
25 miles per hour south

Answers

300 miles / 6 hours = 50 miles per hour

Answer:

50 miles per hour north

Explanation:

took test

As the amount of surface area increases, what happens to the rate of this reaction? If the antacid tablet were broken into eight pieces, what would be a reasonable estimate for the time of

Answers

as the surface  area increases the rate of reaction  also increases.

Explanation:

Answer:

A.) The rate is faster.

C.) 28 Seconds

HOW CAN AN APPLE DEMONSTRATE POTENTIAL AND ENERGY

Answers

Answer and Explanation in one:

In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. So basically, you could possibly demonstrate with a variety of examples. One example may be just sitting on a table, waiting to get rolled off. I know it sounds silly, so here's another example. You are holding a bow and arrow, you pull back the arrow, aiming at the target. You are holding the arrow, filling it with potential energy. When it is let go, it is kinetic energy, the act of an object in motion, slowly riding of it's potential energy.

Which of the following statements about peer pressure is TRUE?
A) Peer pressure is saying “no” and meaning it.
B) Peer pressure is the pressure to go along with the behavior and beliefs of your friends.
C) Peer pressure encourages people to do things they know are wrong.
D) Peer pressure is the pressure to do something dangerous.

Answers

Answer:

B because I remember that's what peer pressure is

Answer:

C

Explanation:

I think it is C because peer pressure is doing something you don't want to do and you think it is wrong to do that, but it could aslo be B.  

Student one used bowling ball A in a bowling game against Student 2, who used bowling ball B. Use Newton’s Three Laws of Motion to explain the following:

Make a claim as to how Newton’s Three Laws of Motion can impact the bowling game for the 2 students. .

Use the image below and your background knowledge of how mass, acceleration, and force differ for the two bowling balls to support your claim, and provide reasoning as to how this evidence supports your claim.

Explain what variable the players could manipulate to maximize the force exerted on the pins.

Answers

Answer:

Newton’s Three Laws of Motion has a great impact.

Explanation:

Newton’s Three Laws of Motion has a great impact on the bowling game for the 2 students. When the student one throw ball to the student 2, the ball decrease its speed due to the gravity and opposing air. If these forces are removed from the system the ball will continue its motion till another force is applied on it. When the force applied to the ball it produces acceleration in the direction to the applied force. If the ball touches the ground it bounce back with equal force which is a reaction of the ground.

Without the comma, the above sentence appears to be asking if the ______ actually ate bob.
a.friend
b.bird

Answers

Answer:

b. bird

i am pretty sure this is right, but i cant be sure bcause i  know what the sentence is.  

❤️❤️❤️PLEASE HELP ME WITH THIS QUESTION TWO PARTS❤️❤️❤️

Answers

Answer:

yes

Explanation:

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