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8 June, 13:11

A mover uses a ramp to load a crate of nails onto a truck. The crate, which must be lifted 1.5 m from the street to the bed of the truck, is pushed along the length of the ramp. If the ramp is 4.5 m long and friction between the ramp and crate can be ignored, what is the mechanical advantage of the ramp?

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  1. 8 June, 14:44
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    Answer: M. A = 3

    Explanation:

    A ramp is an example of an inclined plain. Where the

    Height H = 1.5 m

    Length L = 4.5 m

    Mechanical advantage of a machine is the ratio of the load to effort. While mechanical advantage M. A of an inclined plain is the ratio of the length of the plain to the height of the plain.

    M. A = L/H

    Substitute the values of L and H into the formula

    M. A = 4.5/1.5 = 3

    The mechanical advantage of the ramp is 3
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