Question

When a girl steps on a weighing machine the reading shows 42 kg , what is her mass?

Answer 1

$\huge{\underline{\red{\mathsf{Answer:-}}}}$

4kg

$\huge{\underline{\blue{\mathsf{Explanation:-}}}}$

Given :-

Weight of girl = 42 N

Gravitational Force (g) = 10 m/s²

_________________________

To Find :-

Mass of Girl

_________________________

Solution :-

We have formula :-

$\huge{\boxed{\boxed{\sf{Weight \: = \: Mass {\times} g}}}}$

$\large{\implies}{\boxed{\mathbf{Mass \: = \: {\frac{Weight}{g}}}}}$

________________[Put Values]

⇒ Mass = 40/10

⇒ Mass = 4 kg

$\huge{\mathsf{Mass \: = \: 4 \:kg}}$

Answer 2

Answer:

The weighing machine reads slightly less than the actual value. This is because of the upthrust of the air acting on our body. Hence , her actual weight is mor than 42 kg

Explanation: