A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step of the staircase is 15 cm, find the power of the boy.

375 W

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

480 W

No worries! We‘ve got your back. Try BYJU‘S free classes today!

550 W

No worries! We‘ve got your back. Try BYJU‘S free classes today!

5390 W

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $375 W$
Given mass of body $(m) = 50 k g$
$h = 45 \times 15 = 675 c m = 6.75 m$
$t = 9 s$ $δ = 10 m$
Potential energy $= m g h$
$= (50 \times 10 \times 6.75) 5$
$= 33755$
Power of the body $= \frac{P o t e n t i a l e n e r g y}{T i m e}$
$= \frac{3375}{9}$
$= 375 W$

Suggest Corrections

Similar questions

50

45

9

15

g = 10 m s^{- 2}

m s^{- 2}

40 kg

40

10 s

25 cm

g = 10 {m/s}^{2}

Join BYJU'S Learning Program