A 84.04-kg skier with an initial speed of vi=39.55 m/s coasts up a H=12.44-m-high rise. The slope angle is theta=16. What is her final speed at the top? Assume the coefficient of friction between her skis and the snow is 0.123 (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.) Use g = 10 m/s2.

In the figure below, a block slides along a path that is without friction until the block reaches the section of length L = 0.80 m, which begins at height h = 2.0 m on a ramp of angle = 30°. In that section, the coefficient of kinetic friction is 0.55. The block passes through point A with a speed of 8.0 m/s. If the block can reach point B (where the friction ends), what is its speed there, and if it cannot, what is its greatest height above A? m/s BA O Ꮎ

A 4 kg box slides down an incline plane. It has an incline of 1.25664 radians and coefficient of kinetic friction of .5, what’s the final speed of the box if it started at rest and change in height is 6.4 m

2. In the accompanying figure, a tiny cube is pushed and released at point A. It has an initial velocity of 7.23 m/s. The whole course is frictionless except that marked L which is 16.2 m and has a coefficient of kinetic friction of µk = 0.78. Heights hi = 6.00 m and h2 = 2.00 m. (a) What is the speed of the cube at point B? (Hint: you do NOT need its mass) (b) What is the speed of the cube at point C? (c) Does the cube make it to point D? If so, how fast is it going there? If not, what is its distance traveled through region L?

A car requires 72.8 hp to maintain a constant speed of 21.3 m/s on a straight, flat road. Assuming other losses are negligible, determine the magnitude of the total resistive force FR acting on the car (due to friction, air resistance, etc.). Use this conversion as needed: 1 hp = 746 W. FR = × 10³ N

An object with a mass of 12.5 kg is moving along a rough horizontal surface. At a certain point it has 66 J of kinetic energy. If the coefficient of friction between the object and the surface is 0.44, how far will the object go beyond that point before coming to a stop? Express your answer in meters, to at least one digit after the decimal point. plz help and use g = 9.8

14. In the figure, a 4.0 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is vo = 6.0 m/s, the height difference is h = 1.2 m, and uk = 0.40. (1) Find the speed of the block when it just reaches the higher level (2) Find the distance d. μ = 0 -μ*

A car has an engine that produces constant power. The car is accelerated from rest at t = 0, and at t = t0 the acceleration is a0. What is the acceleration of the car at = 4t0?

In the figure, a 4.2 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is vo = 6.3 m/s, the height difference is h = 0.96 m, and Hk = 0.612. Find d. H = 0- Number Units

QUESTION 8 OK, same sort of track, but now with d = 2.10 m. Now suppose the blocks starts on the track at x = 4.76 m. The block is given a push to the left and begins to slide up the track, eventually reaching its maximum height at x = 0, at which point it turns around and begins sliding down. What was its initial speed in this case?   A 8.30 m/s   B 14.55 m/s   C 10.29 m/s   D 17.39 m/s