A current can be produced in a coil of wire .

a. as a core of iron is being thrust through the coil
b. when a magnet rests in the coil
c. when a core of iron rests in the coil
d. as a magnet is being thrust through the coil

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)