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8_murik_8 [283]
3 years ago
14

A car is on a circular off ramp of an interstate and is traveling at exactly 25 mph around the curve. Does the car have velocity

? Yes No Does the car have acceleration? Yes No Is the car decelerating? Yes No
Physics
1 answer:
netineya [11]3 years ago
6 0

Answer:

The car has velocity and acceleration but is not decelerating

Explanation:

Since the car is traveling at 25 mph around the curve, it has a tangential velocity. This tangential velocity is constantly changing in direction (so the car could adapt to the curve and not moving forward in a straight line), there should be a centripetal acceleration in play here. This acceleration does not slow down the car so it's not decelerating.

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Answer: The velocity at different marked time points are given as

t1 = -

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t3 = +

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Explanation:

The slope of the tangent of the curve indicates the instantaneous velocity. So if the slope of the tangent is positive, that Is, the tangent makes a positive angle (above the horizontal axis) with the horizontal

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From the position-time graph attached, the sign on the instantaneous velocity for each time marked on the graph is given below

t1 = -

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QED!

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