Solve the following.
1. In a construction site, a crane is used to lift a 300 kg metal beam to a height of 10 meters in 0.75 min. Calculate the power of the crane.
2. What power is developed by a 55 kg person who does a lot of chin-ups with a height of 3 m in 45 sec.?
3. A net force of 5 x 102 N is used to move a speedboat at a constant speed of 2.5 m/s. how much power is developed?
4. A machine does 644 meters of work on a 52-kg mass in 18.8 seconds. What is the power put out by this machine?
5. During the Powerhouse lab, Jerome runs up the stairs, elevating his 95.8 kg body at a vertical distance of 3.18 meters in a time of 2.36 seconds at a constant speed.