Calculating the acceleration of two people pulling a box with same force and angle.

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

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?