Question

if an engine supply100joule of energy to a weight 200gram how height it can be lifted?(given g=9.8m/s square)

Answer 1

Let the height through which the body is lifted be h.

Energy supplied by the engine = 100 Joules

Weight of the body = 0.2 × 9.8

Now, we will apply energy conservation.

The energy supplied by the engine will get converted into the gravitational potential energy.

mgh = 100

$h = \frac{100}{0.2 \times 9.8}$

h = 51.02 meters

Hence, the height through which the body gets lifted is 51.02 meters.

Answer 2

W=mgh
h=100÷200×10^-2=50m