Question

A 1200N load is to be lifted with 200N effort using a frist class lever. At what distance from the fulcrum must the effort be applied when the load is 15cm away from the fulcrum.​

Answer 1

Let's simply work with it.

Here,

load = 1200N

Effort = 200N

Load distance = 15cm

We have,

According to the principle of lever.

L×LD = E×ED.

1200×15 = 200× ED.

18000 = 200ED.

ed =1800 /200

Therefore, Effort Distance = 90cm.

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