If a ball of cheese is fired into frictionless space, the amount of force needed to keep it going equals how much? A. Half as much as the initial force
B. Zero, since no force is requires to keep it moving through a frictionless space.
C. Same as the initial force
D. twice as much as the initial force

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

What kind of simple machine is a catapult?