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March 26, 2017

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A 1200 kg car is moving on the freeway at 65 mph. (A) find the magnitude of its momentum and its kinetic energy in SI units. (b) if a 2400 kg SUV has the same speed asthe 1200 kg car, how much momentum and kinetic energy does it have?

  • Physics - ,

    on b), twice the mass means twice the momentum and twice the energy.

    a) change 65mph to m/s. To check that, put this in your google search window:
    65miles/hr in m/s

  • Physics - ,

    so the answer would be 29.05 m/s for a

  • Physics - ,

    No. That is the velocity. Now compute momentum, and KE.

  • Physics - ,

    300 000 = (1/2)M x 20^2 so M = 1 500kg

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