a 115 kg football player moves a 135 kg training sled with a constant velocity. the ground has a u= 0.4. determine the amount of traction the football player had.​

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.