True 0r False?

A car traveling at 20 mph on a curved exit ramp has a constant velocity.

Comments

  • False.

    Velocity is a vector, and as such is has a magnitude and direction component.

    The speed of the car may remain constant, but if the direction of the car is constantly changing (turning on the ramp), then the velocity is NOT constant.

    When there is a change in velocity, there is an acceleration. This acceletation is caused by a net force (we know this because of Newtons 2nd Law of motion). The net force acting to change the velocity in this case is the friction between the tires and the road.

  • False. The vectors of the curve affect its speed infintesimally.

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  • False. It has constant speed.

  • False. It is subject to centripetal acceleration.

  • depends on the curve and whether the curve changes

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