Which statement is true about using shorter, steeper inclined planes to lift an object? A. Fewer lifters are needed, and it will take more time.
B. Fewer lifters are needed, and it will take less time.
C. More lifters are needed, and it will take more time.
D. More lifters are needed, and it will take less time.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.