Question

What is the angular momentum (in kilogram-meter^2/second) of a 500.0 g ball rotating on the end of a string in a circle of radius 1.45 m at an angular speed of 1.50 rad/s?

Answer 1

L=Iω=mR²ω =0.5•1.45²•1.5 = 0.29 kg•²/s

Answer 2

A boy shoves his stuffed toy zebra down a frictionless chute, starting at a height of 1.49 m above the bottom of the chute and with an initial speed of 1.55 m/s. The toy animal emerges horizontally from the bottom of the chute and continues sliding along a horizontal surface with coefficient of kinetic friction 0.261. How far from the bottom of the chute does the toy zebra come to rest? Take g = 9.81 m/s2.