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17 July, 15:08

A 325 N force applied to an object for 5.5 s. What's the impulse?

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  1. 17 July, 15:14
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    According to Newton second law of motion, the resultant force is directly proportional to the rate of change in momentum while maintaining other factors constant. Therefore, F = (mv-mu) / t where F is the resultant force, m is the mass of the object, v is the final velocity and u is the initial velocity.

    Hence, Ft = mv-mu, but impulse is given by force multiplied by time, thus, impulse is equivalent to the change in momentum.

    Impulse = Ft

    = 325 * 2.2 sec

    = 715 Ns
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