a 55-kg baseball player slides into third base with an initial speed of 4.6 m/s. if the coefficient of kinetic friction between the player and the ground is 0.50, what is the player's acceleration?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Newtons view of arrangement of the universe. don't copy from anywhere.

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? a b c d