Question

The mass of a boy is 40 kg . What is his weight on the surface of the earth and what is his weight on the surface of the moon ? Given that g = 9.8 m /s and gm = 1\6 ge​

Answer 1

Explanation:

mass is everywere same

therefore mass=40 kg

weight on earth= mg

=40×9.8=392 newton

weight on moon=1/6×9.8×40=66 newton

Answer 2

Given:

Mass of boy = 40 kg

gravitational acceleration on earth (g) = 9.8 $m/s^{2}$.

gravitational acceleration on moon ($g_{m}$) = $\frac{1}{g}$

To Find: Weight of boy on earth and weight of boy on moon

Calculation:

• Weight is the force due to gravity exerted on a body = mg
• Mass of any object is constant, no matter wherever it is measured.
• Weight of body differs according to gravitational acceleration.
• Weight of body on earth = mg = 40 * 9.8 = 392 Newton
• weight of body on moon = $\frac{mg}{6} = \frac{392}{6} =65.33$ Newton

Answer:

Weight of body on earth and on moon are 392 Newton and 65.33 Newton respectively.