Question

find the effort required to lift a stone of mass 120 kg with the help of a lever 1.5 m long if the load arm is 0.3m
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Answer 1

Answer:

Mass of the stone = 120 kg

Length of the lever = 1.5 m

Length of the load arm = 0.3 m

To find:

The effort required to lift the stone

Calculation:

Weight of the stone = m×g

= 120×10 = 1200 N

We know the relation

By substituting the values in the above relation

Final Answer:

The effort required to lift the stone is 240 N

Hope it would help you.

Answer 2

Given:

Mass of the stone = 120 kg

Length of the lever = 1.5 m

Length of the load arm = 0.3 m

To find:

The effort required to lift the stone

Calculation:

Weight of the stone = m×g

= 120×10 = 1200 N

We know the relation,

Effort arm = Load

Load arm Effort

By substituting the values in the above relation

1.5 = 1200

0.3 Effort

Effort = 1200×0.3

1.5

Effort = 240 N

Therefore,

The effort required to lift a stone is 240 N.

Hope this helps you...