Auniform sphere with mass m and radius r is rotating with angular speed ω1 about a frictionless axle along a diameter of the sphere. the sphere has rotational kinetic energy k1. a thin-walled hollow sphere has the same mass and radius as the uniform sphere. it is also rotating about a fixed axis along its diameter.

in terms of ω1, what angular speed must the hollow sphere have if its kinetic energy is also k1, the same as for the uniform sphere?

express your answer in terms of

How is the gravitational force related to the distance between two objects?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.