Question

यदि 250 ग्राम की गेंद को 19.6 जूल ऊर्जा दी जाए तो कितना ऊपर उठेगी?


please immediately solve .
ans. is 8 mitres

Answer 1

Mass of the ball = 250 grams = 0.25 kg

Kinetic energy given = 19.6 Joules

Acceleration due to gravity = 9.8 m/s^2

Let the height achieved by the ball = h

At the highest point, all the kinetic energy will be converted in the gravitational potential energy.

Hence, applying energy conservation:

mgh = 19.6

$h = \frac{19.6}{mg}$

$h = \frac{19.6}{0.25 \times 9.8}$

h = 8 m

Hence, the height achieved by the ball is 8 meters.