Joe is standing on the pedal of a bicycle. If his mass of 65 kg, the pedal makes an angle of 55º above the horizontal, and the pedal is 18 cm from the center of the chain ring, how much torque does he exert? a. 4 N·m c. 94 N·m b. 18 N·m d. 122 N·m
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What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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.

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