A roller-coaster car is moving at 4.12m/s along a straight horizontal track before entering the first drop. What will the speed of the coasterbeat point B? Ignore friction and air resistance.

A 8kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 230N. For the first 13 m the floor is frictionless and for the next 14m, the coefficient of friction is 0.3. What is the final speed of the crate in m/s?

14. A 55-kg skier starts from rest at the top of a ski jump, point A in the figure, and travels down the ramp. If friction and air resistance can be neglected, Determine her speed ve when she reaches the horizontal end of the ramp at B. 45.0 m 30.09

A 108 kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope 1.2 m higher than ground level shown in the following figure. -8.0 m- f1.2 m (a) If the skier coasts up the hill, what is his speed (in m/s) when he reaches the top plateau? Assume friction between the snow and skis is negligible. 8.16 m/s (b) What is his speed (in m/s) when he reaches the upper level if a 75 N frictional force acts on the skis? 6.31 X m/s

A ball is released at a height of h=2.70 m on a frictionless 30.0o slope. At the bottom, it turns smoothly (without loss of speed) onto a 60.0o slope going back up. What maximum height does it reach on the right side?

A roller coaster ride starts at a height of 35 m above the ground. The mass of the car is 450 kg. Assuming friction can be ignored. What will the speed of the car be at the top off the first 20 m loop?

a girl and her bicycle have a total mass of 60kg. at the top of the hill her speed is 5.0m/s. The hill is 5.0 m high and 100 m long. If the force of friction as she rides down the hill is 20N, what is her speed at the bottom?

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 roller coaster starts with a speed of 4.1 m/s at a point 51 m above the bottom of a dip. Neglecting friction, what wil be the speed of the roller coaster at the top of the next slope, which is 30 m above the bottom of the dip? Answer: m/s

A 2.9-kg block with a speed of 4.2 slides down a 7.4-m high, frictionless incline. What is the speed at the bottom?