John runs 120 meters in 10 seconds and then runs back to where he started in
another 10 seconds. Which statement is true?
A. His speed is 0 m/s
B. His velocity is 12 m/s
C. His velocity is 0 m/s
D. His acceleration is 12 m/s

Which of the following is an example of units for speed

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

In a system, when potential energy decreases, then entropy also decreases. true false