a puck moves 2.35 m/s in a -22.0 direction. a hockey stick pushes it for 0.215s, changing its velocity to 6.42 m/s in a 50.0 direction. what was the acceleration

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

How do you know how many valence electrons an atom has?

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m