The driver of a 1000 kg car traveling on the interstate at 35 m/s slams on his brakes to avoid hitting a second vehicle infront of him, which had come to rest because of congestion ahead. After the brakes are applied, a constant friction force of 8000 N acts on the car. Ignore air resistance.
At what minimum distance should the brakes be applied to avoid a collision with the other vehicle?
(T14) A 70-kg diver steps off a 10-m tower and drops, from rest, straight down into the water. If he comes to rest 5.0 m beneath the surface, determine the average resistive force exerted on him by the water.
(T13) A 0.250-kg block is placed on a light vertical spring ( k = 5.00 x 10 3 N/m) and pushed downward, compressing the spring 0.100 m. After the block is released, it leaves the spring and continues to travel upward. What height above the point of release will the block reach if air resistance is negligible?
An extreme skier, starting from rest, coasts down a mountain that makes an angle 25.0° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.200. She coasts for a distance of 8.0 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 4.00 m below the edge. How fast is she going just before she lands?