# physics

if an object is pushed along a rough horizontal surface and moves at a constant velocity, then...

1. 👍 0
2. 👎 0
3. 👁 196
1. it does not accelerate.

the friction exactly balances the motive force.

1. 👍 0
2. 👎 0
2. F-Fk = M*a.
F-Fk = M*0,
F-Fk = 0,
F = Fk. = Force of kinetic energy.

1. 👍 0
2. 👎 0
3. Correction: F = Fk = Force of kinetic friction.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### college physics

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.860 m/s encounters a rough horizontal surface of length = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is

asked by ann on November 21, 2011
2. ### physics

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.875 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface

asked by Ange on March 9, 2015
3. ### Physics

A 4.5kg box slides down a 4.1-m -high frictionless hill, starting from rest, across a 1.7-m -wide horizontal surface, then hits a horizontal spring with spring constant 490N/m . The other end of the spring is anchored against a

asked by Lena on June 8, 2014
4. ### physics

a body is pulled over a surface by applying 20 Newton making an angle 60 degree with the horizontal.if the body moves with constant speed on a rough surface on which coefficient of friction is .4 then the mass of the body is?

asked by hanan on July 20, 2014
5. ### Physics

A horizontal force of 150 N is used to push a 32.5-kg packing crate a distance of 4.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force? (b)

asked by Abdul A. on May 3, 2013
1. ### PHYSICS!

an object weighs 528.0 Newton. It is being pushed along a horizontal surface by a 475.0-Newton force. Determine the mass of the object in a numerical form.

asked by Michael on October 31, 2012
2. ### AP Physics

A horizontal force of 160 N is used to push a 49.0 kg packing crate a distance of 7.00 m on a rough horizontal surface. The acceleration of gravity is 9.81 m/s If the crate moves with constant velocity, calculate the coefficient

asked by lili on January 17, 2016
3. ### Physics

A horizontal spring with spring constant 110N/m is compressed 16cm and used to launch a 2.8kg box across a frictionless, horizontal surface. After the box travels some distance, the surface becomes rough. The coefficient of

asked by Lena on June 8, 2014
4. ### physics

A horizontal force of 150 N is used to push a 45.0-kg packing crate a distance of 5.75 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force (b) the

asked by Sierra on February 17, 2015
5. ### Physics

As an object slides across a rough horizontal surface, what happens to the object's gravitional potential energy with respect to the surface and speed? Would't potential energy decrease at rest?

asked by Priscilla on January 7, 2010