A boy is trying to roll a bowing ball up a hill as shown in the image below. If friction is ignored what is the minimum initial velocity that the ball must have for it to reach the top of the hill? (Recall that g=9.8 m/s^2)
A.14 m/s
B.21 m/s
C.28 m/s
D.7 m/s

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

The slope of a velocity time graph over any interval of time gives the during that interval

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.