A 3.0 kg toy car is released at the top of a frictionless track on the left and rolls off of the track frorn its right side ramp. The car starts at a height of 0.80 m, goes through a 0.50 m diameter loop, and exits the
ramp at a height of 0.25 m.

What is the change in the cars gravitational potential energy from A to B?​

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.