A merry-go-round rotates at the rate of 0.5 rev/s with an 83 kg man standing at a
point 2.2 m from the axis of rotation.
What is the new angular speed when the
man walks to a point 0 m from the center?
Consider the merry-go-round is a solid 54 kg
cylinder of radius of 2.2 m.
Answer in units of rad/s.

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in this collision? explain why or why not.

Asoccer ball of mass 0.43 kg is rolling with velocity < 0, 0, 1.8> m/s, when you kick it. your kick delivers an impulse of magnitude 2.7 nâ·s in the direction. the net force on the rolling ball, due to the air and the grass, is 0.22 n in the direction opposite to the direction of the ball's momentum. using a time step of 0.5 s, find the position of the ball at a time 1.5 s after you kick it, assuming that the ball is at the origin at the moment it is kicked. use the approximation . (express your answer in vector form.) < entry field with incorrect answer 12.97 , entry field with correct answer 00 , entry field with incorrect answer 2.7 > m

Which of the following correctly compares uv rays and infrared waves? infrared waves have higher energy than uv rays. infrared waves have the same wavelength as uv rays. infrared waves have lower frequency than uv rays. infrared waves have shorter wavelength than uv rays.