Question

How much work does an elevator motor need to do to lift a 1400kg elevator a height of 100m?

Answer 1

ans. 1400000

we know that

work done by gravity = mgh

just putting values we get

= 1400x 100 x 10

= 1400000

hence,work done an elevator motor need to do to lift a 1400kg elevator a height of 100m is 1400000