2595

Physics Work,Power & Energy Level: High School

A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section on the track (as shown in the figure below ) . It leaves the track horizontally , flies through the air , and subsequently strikes the ground . The acceleration of gravity is 9.81 m/s^2 . At what height h above the ground is the block released ?

a) What is the speed of the block when it leaves the track ?

b) What is the total speed of the block when it hits the ground ?