Question

a work of 4900 j is done on road of mass 50 kg to lift to a certain height . calculate the height through which the load is lifted

Answer 1

Heya folk !!

Here's the answer you are looking for

Since, the object is raised to certain height, the work done is equal to the potential energy stored in the body.

So, W = PE = mgh where m is the mass, g is the acceleration due to gravity and h is the height upto which the object is raised.

Here, 4900 = 50 × 9.8 × h ( g = 9.8m/s²)

$h \: = \frac{4900}{50 \times 9.8} = \frac{4900}{5 \times 98} \\ \\ h = 10$

Therefore, the object is raised to a height of 10m.


★★ HOPE THAT HELPS ☺️ ★★

Answer 2

50x9.8xh = 4900
h = 4900/490
h = 10 m