Question

A body of mass m is moved from the ground to a height h. If force of gravity on mass of 1 kg is newton find the force needed to lift the body.

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Answer 1

☞Answer

Force = g N

☞Given

A body of mass m is moved from the ground to a height h. If force of gravity on mass of 1 kg is newton

☞To Find

The force needed to lift the body

☞Solution

• Mass , m = 1 kg
• Force , F = ? N

Acceleration due to gravity , a = g

Now , " Force is defined as product of mass and acceleration "

⇒ F = ma

⇒ F = mg

So , this force is equals to weight of the body.

⇒ F = (1) g

⇒ F = g N

So , Force needed to lift the body is equals to acceleration due to gravity .

Answer 2

Answer:

When a body of mass m at A on ground is raised above ground through height h at B force is applied. This force applied = weight of body Force on mass m = F = mg Where ‘g’ is the force of gravity on a mass of 1 kg.

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