In which of the following examples does the object have both kinetic and potential energy? select all that apply.
a a rock at the edge of a cliff
b a plane in flight at 30,000 feet
c water behind a dam
d water flowing downstream
e a car moving on a level road
f a compressed spring
g a child swinging on a swing
h a bouncing ball

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?