Physics

A cheetah can run approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey?

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  1. time = t
    distance in meters = 1,000*distance in km
    distance covered by cheetah = d
    distance covered by gazelle = d-70
    d = 100,000 t
    d-70 = 80,000 t
    so
    70 + 80,000 t = 100,000 t
    20,000 t = 70
    t = 7/2000 hours

    in seconds (3600 s/h)
    t in seconds = 7*3600/2000 = 12.6 seconds

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  2. 3.5 hours

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  3. VERY GOOD

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