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Question

The mechanical advantage of an inclined plane is :

A
always greater than unity
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B
always less than unity
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C
equal to unity
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D
none of the above
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Solution

The correct option is A always greater than unity
In an inclined plane, the formula for mechanical advantage is the length of the slope divided by the height of the inclined plane. where, Mechanical advantage = slopelengthheight.

Since for a right angle triangle, slope (i.e. hypotenuse ) is always greater than the height (i.e. any side), the mechanical advantage is greater than unity in case of an inclined plane.

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