A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620 J, its velocity at this position is

Question

A body of mass 15 kg is raised from certain depth- If the work done in raising it by 10 m is 1620 J- its velocity this position is4  ms-1- 1 ms-1-8  ms-1-2  ms-1-

Toppr Admin · Accepted Answer

W-mgh-12mv21620-15-xD7-10-xD7-10-12-xD7-15-xD7-v2-x27F9-v-4-xA0-m-s

A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620 J, its velocity at this position is
$4 m s^{- 1}$
$1 m s^{- 1}$
$8 m s^{- 1}$
$2 m s^{- 1}$

$W = m g h + \frac{1}{2} m v^{2}$

$1620 = 15 \times 10 \times 10 + \frac{1}{2} \times 15 \times v^{2}$

$⟹ v = 4 m / s$

A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620 J, its velocity at this position is4 ms−11 ms−18 ms−12 ms−1

W=mgh+12mv21620=15×10×10+12×15×v2⟹v=4 m/s

A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620 J, its velocity at this position is
$4 m s^{- 1}$
$1 m s^{- 1}$
$8 m s^{- 1}$
$2 m s^{- 1}$

$W = m g h + \frac{1}{2} m v^{2}$

$1620 = 15 \times 10 \times 10 + \frac{1}{2} \times 15 \times v^{2}$

$⟹ v = 4 m / s$