Which of the following happens to an object in uniform circular motion? A. The direction of its velocity stays the same.
B. its velocity changes.
C. Its centripetal acceleration changes.
D. Its speed changes.

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