A rock is a tied to a string that is 0.7 m and whirled in a circle at a constant speed of 6 m/s, what is the centripetal acceleration of the rock? I don’t need the work or explanation, just the answer please!

Ared apple is illuminated by a blue light the apple will appear

Which articulations allow for greatest range of motion?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)