Given a water tower with the lower end at 50.0 meters above the ground, and the top 60.000 meters above the ground and a radius of twenty meters. What is the minimum power needed on the pump to fill it from empty to full in 13.35 hours.

The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?