A commuter backs her car out of her garage with a constant acceleration of 1.60

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A commuter backs her car out of her garage with a constant acceleration of 1.60 m/s2.

(a) How long does it take her to reach a speed of 1.60 m/s?
 s
(b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration?
 m/s2
Sep 8th, 2015

Thank you for the opportunity to help you with your question!

acceleration a= 1.60 m/s2.

speed =1.60m/s

time

Formula

A)  v = u + at

where v is final velocity

u is initial velocity

a is acceleration

t is time

=1.6= 0 + 1.6 x t
=t = 1 sec

B) By v = u + at
0 = 1.6 + a x 0.8
a = -2 m/s^2 {-ve just indicating that it is retardation}


Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 8th, 2015

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