Physics
A car acquires a velocity of 54 ms-1 in 20 s starting from rest, then its acceleration is:
- 5.4 ms-2
- 2.7 ms-2
- 7.2 ms-2
- 2.0 ms-2
Motion in One Dimension
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Answer
2.7 ms-2
Reason — Given,
u = 0
v = 54 ms-1
t = 20 s
a = ?
Using, v = u + at or
a =
a = = 2.7 ms-2 .
Hence, acceleration = 2.7 ms-2
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