Arocket is launched straight upward with a velocity of 90 m/s. it slows down, reverses direction, and returns to earth. what is the rockets velocity at its highest point above the ground. a. 0.078 m/s b. 0 m/s c. -7.0 m/s d. 13 m/s e. -13 m/s

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Which of the following are appropriate acceleration units?