It is harder to stop a rolling bowling a ping pong when both are rolling at the same time this is an example of
a. inertia
b. balanced force
c. momentum
d. velocity

What are similarities and differences between refraction, reflection, diffraction and absorption?

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?

What happens to an isotope during radioactive decay?