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1. Inclined planes are widely used to move heavy loads over vertical obstacles; examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade.
2.Nutcracker is second class lever as the load is in between effort and fulcrum.However, tongs are third class lever as effort is in between load and fulcrum
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sis am sorry aapko bhule nhi wait karti hun...
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