science
Grade-9
Easy
Question
A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s2.
Hint:
6 m/s²
The correct answer is: 6
Given that,
The initial velocity, u = 0
The final velocity, v = 30 m/s
Time taken, t = 5 s
On using the first equation of motion we get,
v = u + at
Or, a = (v – u)/t
Or, a = (30 – 0)/5
Or, a = 30 / 5
Or, a = 6 m/s2
Therefore, the acceleration of the bus is 6 m/s2.
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