A car acquires a velocity of 72 km per hour in 10 seconds starting from rest . Calculate the acceleration of the car .
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Answer :
Initial velocity = zero
Final velocity = 72km/h
Time interval = 10s
We have to find acceleration of car
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◈ Acceleration is defined as the rate of change of velocity.
It is a vector quantity having both magnitude as well as direction.
It can be positive, negative ot zero.
SI unit : m/s²
Conversion :
1 kmph = 5/18 mps
72 kmph = 72 × 5/18 = 20 mps
➝ a = v - u / t
➝ a = 20 - 0 / 10
➝ a = 10m/s²
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