physics

Suppose you start an antique car by exerting a force of 300 N on its crank for 0.250s. What angular momentum is given to the engine if the handle of the crank is 0.300 m from the pivot and the force is exerted to create maximum torque the entire time?

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  1. We can use the equation τ = Change in angular momentum/Change in time

    To find τ, the torque:
    => Force x Distance
    => 300N * 0.3m = 90Nm

    Angular Momentum given = τ*t
    = 90*0.250
    = 22.5Nms

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