Calculate the work done if a boy lifts a bag of cement 500N to the floor of a lorry 2.5m above the ground

Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly