Work done by a system
its total energy.
increases
decreases
doesn't change

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

Describe uniform velocity and variable velocity in short

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat