Please answer both as I am studying for finals. I will give an upvote if both are answered.
A 1.00 x 102 kg go-cart (including the driver) is traveling at 7.0 m/s at the top of a 20.0 m high hill. The go-kart and driver coast down the frictionless hill. The speed of the go-kart and driver when they reach the bottom of the hill is _________m/s.
A 1.00 x 102 kg go-cart (including the driver) is traveling at 7.0 m/s at the top of a 20.0 m high hill. The go-kart and driver coast down the frictionless hill. If the driver of the go-cart applies the brakes at the bottom of the hill, supplying a 6.0 x 102 N force of friction on the go-cart, the go-cart’s speed will be _____ m/s after 10.0 m of travel.
