Physics

posted by .

A 44.0 kgseal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m higher than the surface of the water and the ramp is inclined at an angle of 35. degrees above the horizontal.

If the seal reaches the water with a speed of 4.00 {\rm m/s}, what is the work done by kinetic friction?

• Physics -

Work done AGAINST friction = (P.E loss) - (K.E. gain)

= M g H - (1/2)M V^2

(V is the speed when it hits the water)

The angle of the ramp doesn't matter when computing the answer, but it does affect how much frictional work is done

The work done BY the friction is negative

Respond to this Question

 First Name School Subject Your Answer

Similar Questions

1. physics

A block slides down a frictionless ramp. If the ramp angle is 22 degrees and the length of it is 25m. find the speed of the block as it reaches the end of the ramp, assuming it started sliding from rest at the top.
2. Phsyics

A 44.0kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75m higher than the surface of the water and the ramp is inclined at an angle of 35.0 degrees above the horizontal. What …
3. Physics

On a recent trip to a water park, you notice there is a new slide that you ride down a steep hill, then it carries you back up another ramp and shoots you into a pool. All the kids around you are saying that you leave the ramp at 50 …
4. physics

A 5.30 kg package slides 1.57 m down a long ramp that is inclined at 11.8^\circ below the horizontal. The coefficient of kinetic friction between the package and the ramp is mu_k = 0.320 Calculate the work done on the package by the …
5. Physics

Box, mass m 1 , at rest against a compressed spring, spring constant k and compression of Δx, at the top of a ramp, height h, is released. It slides down the ramp, angle θ, with friction, coefficient μ. Half way down …
6. physics

A box of mass 5.0 kg starting from rest slides down a 1.8 m long ramp inclined at an angle of 22.0 deg. from the horizontal. If the ramp is frictionless, how long will it take the box, starting from rest, to reach the bottom of the …
7. physics 1401

a 15kg crate initially at rest slides down a ramp 2m long and inclined at an angle of 20 degrees with the horizontal. If there is no friction between the ramp surface and crate, what is the velocity of the crate at the bottom of the …
8. physics

Starting from rest, a 10kg suitcase slides down a 3.00m long ramp inclined at 30 degrees from the floor. The coefficient of friction between the suitcase and the ramp is 0.35. 1) what net force is applied to the suitcase while it is …
9. Physics

Starting from rest, a 10.0 Kg suitcase slides down a 3.00m long ramp inclined at 30.0 degrees from the floor. The coefficient of friction between the suitcase and ramp is .35. A: what net force is applied to suitcase while it is on …
10. Science Psysics

A 6 kg black is placed at the very top of a ramp that is inclined at 31 degrees and the block is released to slide down the ramp. As the block slides friction exerts a constant resistive force of 17N directed back up the ramp What …

More Similar Questions