The wheels, axle, and handles of a wheelbarrow weigh W = 57 N. The load chamber

Question

The wheels, axle, and handles of a wheelbarrow weigh W= 57 N. The load chamber and its contents weighWL = 552 N. The drawing shows these two forcesin two different wheelbarrow designs. To support the wheelbarrow inequilibrium, the man’s hands apply a force to the handlesthat is directed vertically upward. Consider a rotational axis atthe point where the tire contacts the ground, directedperpendicular to the plane of the paper. Find the magnitude of theman’s force for both designs.

Explanation / Answer

For, the first case, Taking moment about the centre of the tYre, WL*0.4 +W*0.6 -F*0.13 =0 So, F= (552*0.4+57*0.6)/0.13          = 1961.53 N For the 2nd case, WL passes througth the centre of the tyre . so momentcaused by it =0 So, W*0.6 =F*0.13 =>F= 263.07 N Do remember to add the distance as they aregiven..

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