Question

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

moon has acceleration times that on earth. Determine the weight of the block of wood
on the moon.
(3 marks)​

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=(W)/(g)\\\\m=(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* (g)/(6)\\\\=100* (9.8)/(6)\\\\=163.33\ N`

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