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1 August, 23:34

If a 1500 kg car can accelerate from 35 km/h to 55 km/h in 3.2 s, how long will it take to accelerate from 55 km/h to 100 km/h? assume the power stays the same, and neglect frictional losses

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  1. 2 August, 01:36
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    The question above can be answered by using the equation below,

    PΔt = 1/2 (mv²)

    From the first case, we solve the power.

    P (3.2s) = 0.5 (1500) (55² - 35²)

    This gives us a value of P which is 421875.

    Using this same power to solve for t in the second scenario,

    421875 * t = 0.5 (1500) (100²-55²)

    The value of t is 12.4 s.
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