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3 years ago

A car starting from rest accelerates uniformly at 3

Physics

1 answer:

kondor19780726 [428]3 years ago

6 0

Answer:

From second newton's equation of motion:

$S = ut + \frac{1}{2} a {t}^{2}$

s » displacement or distance

u » initial speed, u = 0 ( at rest )

a » acceleration

t » time

$s = (0 \times 10) + ( \frac{1}{2} \times 3 \times 10) \\ \\ s = 5 \times 3 \\ \\ { \underline{ \underline{ \: \: distance = 15 \: meters}}}$

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3 years ago

A police car is traveling north on a straight road at a constant 16.0 m/s. An SUV traveling north at 30.0 m/s passes the police

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It will take 15.55s for the police car to pass the SUV

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We first have to establish that both the police car and the SUV will travel the same distance in the same amount of time. The police car is moving at constant velocity and the SUV is experiencing a deceleration. Thus we will use two distance fromulas (for constant and accelerated motions) with the same variable for t and x:

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