The work done by each motor is c) 
Explanation:
The work done when lifting an object is equal to the change in gravitational potential energy of the object:
where
m is the mass of the object
g is the acceleration of gravity
is the change in height of the object
In this problem, each motor is lifting one elevator, so the mass of each elevator is
m = 1000 kg
and we have
Therefore, the work done by each motor is
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We want to know what is the power supplied by the power cell if the current I=0.5 A and the voltage V=0.43 V. The equation for power P is P= I*V, so:
P=I*V=0.5*0.43=0.215 W
So the correct answer is that the power cell is supplying the motor with P=0.215 W of power.
Ball C has the greatest momentum and ball B has the least amount of momentum.
Hello, Manny500
Good question manny and your answer is no sadly but its the oppisitte think of it did you ever watch or heard of flash you know how he can levetate himself its because he goes super fast. According to newtons 3rd law anything that goes really fast does fly. Ok one last example do you know when tornadoes hit how they pick up houses cars it beacuse of fast the object spins. Do you understand?
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