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Question

In a machine, a load of 490 N is supported by an effort of 7N. If the distance of fulcrum from the point where the load acts is 10m, find the mechanical Advantage and length of the effort arm.


A

Effort arm = 70m, Mechanical advantage = 6

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B

Effort arm = 40m, Mechanical Advantage = 6

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C

Effort arm = 70m, Mechanical Advantage = 7

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D

Effort arm = 70m, Mechanical Advantage = 10

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Solution

The correct option is C

Effort arm = 70m, Mechanical Advantage = 7


Load = 490 N

Effort = 70 N

Load arm = 10m

Effort arm = ?

load×load arm =effort×effort arm

490N×10=70N×x

x=490070

x = 70m

Effort arm = 70m

Mechanical Advantage = loadeffort

= 49070 = 7


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