Question 4 of 20 Which ball has the least momentum?
A. A 400 kg ball that is rolling north across a field at 3.0 m/s
B. A 150 g ball that is rolling north across a field at 5.0 m/s
C. A 160 g ball that is rolling north across a field at 2.0 m/s
D. A 450 g ball that is rolling north across a field at 1.0 m/s
SUBMIT

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?

What is friction? how does it affect the motion of an object?