Finding velocity given radius and acceleration

  • Thread starter KLI897
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Homework Statement


A car travels over a hump in the road of radius 20 meters. How fast is the car traveling if the occupants feel a net acceleration of 3.8 m/s2

Homework Equations


a = v2/r
v = √ar

The Attempt at a Solution


I did this but according to my teacher this isn't correct.
v = √(3.8 m/s2)(20 m)
v = 8.718 m/s
 

Answers and Replies

  • #2
haruspex
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Homework Statement


A car travels over a hump in the road of radius 20 meters. How fast is the car traveling if the occupants feel a net acceleration of 3.8 m/s2

Homework Equations


a = v2/r
v = √ar

The Attempt at a Solution


I did this but according to my teacher this isn't correct.
v = √(3.8 m/s2)(20 m)
v = 8.718 m/s
What acceleration would the occupants feel on a flat road? I agree it is not completely clear, but I would guess you are to interpret the felt acceleration in terms of the forces felt.
 

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