Question

Q. 1. A car moving along a straight line at a speed of 54km/hr stop in 5s after the
brakes are applied. (a) Find the acceleration, assuming it to be constant. (b) Plot
the graph of speed versus time. (c) Using the graph. Find the distance covered by
the car after the brakes are applied?
ed by applying brakes​

Answer 1

Acceleration comes out to be -3.

and the graph and its use in taking out the distance covered.

explanation of part A.

given is:-

Initial velocity (u)=54 km/h that is 15 m/s.

Final velocity (v)=0

Time (t)=5 sec.

To find:-Acceleration (a)

solution:- v=u+at(first equation of motion)

substituting the values

0=15+a×5

0=15+5a

-15=5a

-15/5=a

-3=a

Therefore acceleration is -3.

OR

Retardation/deaccleration is 3.

Hope it will help.

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Answer 2

Answer:

hey mate

Explanation:

hope it help you