Question

(1) A block of wood weighs 980N on earth where acceleration due to gravity is 9.8N/Kg. The

Answer 1

Given,

Weight of a block on the Earth = 980 N

Acceleration due to gravity on Earth = 9.8 N/kg

To find,

Weight of the block on the moon.

Solution,

The  moon has acceleration (1/6) times that on earth. Let m be the mass of the block on the moon.

We know that,

W = mg

$m=\dfrac{W}{g}\\\\m=\dfrac{980}{9.8}\\\\=100\ kg$

As mass of an object remains the same everywhere. Weight of the block on Moon is :

W' = mg'

As g'=(g/6)

So,

$W=100\times \dfrac{g}{6}\\\\=100\times \dfrac{9.8}{6}\\\\=163.33\ N$

So, the weight of the block on the moon is 163.33 N.