# work (physics)

posted by marisa

a 25 kg object is accelerating from rest to a distance of 6 m in 4 seconds across a level floor. The friction is 3.8 N - what is the total work........ i started off by trying to find fa but it seems to give me an absurd answer.. maybe if u could help me by telling me the steps i need to do or how to do this.. please, please, please:(

1. bobpursley

The fricion component of work is 3.8*6 joules. Now you can figure final velocity (assuming uniform acceleration) as twice average veloctiy (avgvel=6m/4sec), so Vf=12/4 m/s or 3m/s

Final Ke=1/2 m vf^2, so add that to friction work.

## Similar Questions

1. ### physics

How much work must be done to roll a metal safe, mass 116 kg, a distance of 15.0 m across a level floor?
2. ### physics

1. A boy drags a wooden crate with a mass of 20 kg, a distance of 12 m, across a rough level floor at a constant speed of 1.50 m/s by pulling on the rope tied to the crate with a force of 50 N. The rope makes an angle of 25¡ã with …
3. ### physics

A 25.0 kg pickle is accelerated from rest through a distance of 6.0 m in 4.0 s across a level floor. If the friction force between the pickle and the floor is 3.8 N, what is the work done to move the object?
4. ### physics

A 50-kg block is pushed a distance of 5.0 m across a floor by a horizontal force Fp whose magnitude is 150 N. Fp is parallel to the displacement of the block. The coefficient of kinetic friction is 0.25. A) What is the total work done …
5. ### Physics

A worker applies a constant force of magnitude F = 339 N on a crate in a direction è = 26.1o above the horizontal as he pulls it across a level floor through a distance of s = 7.20 m. The mass of the crate is m = 53 kg and the coefficient …
6. ### Physics

A 25.0kg pickle is accelerated from rest through a distance of 6.0m in 4.0s across a level floor. If the friction force between the pickle and the floor is 3.8N, how much work is required to move the object?
7. ### Physics

A 55-kg block, starting from rest, is pushed a distance of 5.0m across a floor by a horizontal force Fp whose magnitude is 140N. Fp is parallel to the displacement of the block. The final speed of the block is 2.35m/s. a. How much …
8. ### Physics

A factory worker pushes a 32.0 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32 ∘ below the horizontal. The coefficient of kinetic friction between the crate and floor …
9. ### Physics

A box of mass m = 59.0 kg (initially at rest) is pushed a distance d = 84.0 m across a rough warehouse floor by an applied force of FA = 204 N directed at an angle of 30.0° below the horizontal. The coefficient of kinetic friction …
10. ### physics

A 0.5 kg object is given an initial velocity of 3 m/s after which it slides a distance of 8 m across a level floor. What is the coefficient of kinetic friction between the object and the floor?

More Similar Questions