A 1.5 kg ball rises upward 2.0 m above the ground when it is thrown straight up. Use the ground as your reference point ( ) for gravitational potential energy. The kinetic energy of the ball at ground level is closest to: a. 0.0 J b. 3.0 J c. 9.8 J d. 19.6 J e. 29.4 J

What object a collides with object b and bounces back its final momentum is?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?