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Question:
A car starts from rest and accelerates uniformly. It acquires a velocity of 72 km/hr in 10 seconds. What is its acceleration?
Answer:
Since the car is starting fom rest, its initial velcity (u) = 0
Final velocity (v) = 72 km/hr =20 m/s
Time taken for change of velocity (t) = 10 seconds
Acceleration, a = (v-u)/t = (20-0)/10 = 20/10 = 2 m/s2
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∙ 15y ago
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