Homework Statement
A weightlifter is able to lift 250 kg 2.00m, in 2.00s. What is his power output?
Homework Equations
W=M x N
P = W/Change t
The Attempt at a Solution
250 x 2 = 500 (I thought that this was work) so then I divided by time (2.00s) to get power. The answer is not...
Speed at the bottom of a hill - Please help!
Homework Statement
Bike (mass 40kg) traveling down a hill. Speed at the top of the hill is 5.0 m/s. The hill is 10m high and 100m long. Force of friction is 20N, what is the speed at the bottom?
Homework Equations
The only formula I've tried...