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17 February, 07:02

An old teacher runs across the floor with a velocity of 0.5 m/s (he's slowing down) with a mass

of 80 kg.

a. How much KE does he have now?

b. what is the weight of the old teacher

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Answers (1)
  1. 17 February, 07:29
    0
    a. 10 Joules

    b. 800 N

    Explanation:

    Given: Mass, m = 80 kg

    Velocity, V=0.5m/s

    g=10 N/kg

    a. KE = ½MV²

    KE=½*80 * (0.5) ²

    KE=40*0.25

    KE=10 J

    b. Weight, W=mg

    W=80kg * 10N/kg

    W=800 N
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