Question

If a man has a mass 45 kg on the earth, then what is his weight?
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Answer 1

Explanation:

LOL. Ok, the physics answers are entirely correct, but I’m getting the sense you just want a simple, everyday answer. So here you go. The Moon has 1/8 of the Earth’s gravity, so 45 kg divided by 8 equals…. 5.6 kgs.

As layman, we tend to confuse mass and weight as the idea of mass is not something that comes up in everyday life. So we just simplify our weight into kilograms and leave it at that. Can you imagine asking somebody “How many Newtons do you weigh?” No? Neither can I, and I’m a science geek.

x-P :-)

2nd id in following....

Answer 2

Answer:

• Weight of Man on earth will be 441 Newton.

Explanation:

• Weight of a body is defined as the force acting on an object due to the action of gravity.

Therefore, we can say that Weight is simply a force .

Given,

• Mass of Man on earth, m = 45 kg
• acceleration due to gravity on earth, g = 9.8 ms⁻²

Now, As we know

Force = mass × acceleration

therefore,

• Weight = mass × acceleration due to gravity

so,

→ Weight of Man (on earth) , W = m × g

→     W = 45 × 9.8

→     W = 441 N

Hence,

Weight of Man on Earth will be 441 Newton .

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• Weight is a vector quantity.
• SI unit of Weight is Newton (N)
• 1 Newton = 1 kg ms⁻²
• Dimensions formula of Weight is [ M¹ L¹ T⁻² ]