A car starts from rest and acquires a velocity of 54 kmph in 2 minutes. Find (i) the acceleration and
(ii) the distance travelled by the car during this time. Assume that the acceleration of the car is uniform.
(ii) the distance travelled by the car during this time. Assume that the acceleration of the car is uniform.
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Explanation:
ANSWER
Given that,
Intial velocity u=0m/s
Final velocity v=54km/h=54×
18
5
=15m/s
Time t=2min=120s
Now, put the value in equation of motion
The acceleration is
v=u+at
a=
t
v−u
a=
120
15−0
a=o.125m/s
2
Now, again from equation of motion
The distance is
s=ut+
2
1
at
2
s=0+
2
1
×0.125×120×120
s=900m
Hence, the acceleration is 0.125m/s
2
and distance is 900m