# physics

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a car is driven off the edge of that is 54.0 m high. the point of impact is 130m from the base of the cliff. how fast was the car traveling in (miles/hr) when it went over the cliff?

• physics -

How long to fall ?

54 = (1/2) g t^2
108 = 9.81 t^2
t = 3.32 seconds in the air, screaming and wishing for parachute

In 3.32 seconds we went 130 meters at constant horizontal velocity u

130 = t (3.32)
t = 39.2 m/s

so now convert that to miles/hr. (Google). 87.7 miles/hr it says

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