A car accelerates from rest. If the reading on the speedometer after 5s is 72km/h , determine the acceleration of car ?
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Initial velocity = 0
Final velocity = 72km/h
Time = 5sc
The acceleration ,
Final velocity = 72km/h
Time = 5sc
The acceleration ,
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Answer:
-4 m/s^2
Explanation:
initial speed = 72 km/hr = 20 m/s
final speed = 0 m/s
elapsed time = 5 seconds
acceleration = (0 m/s – 20 m/s) / 5 s
acceleration = - 20m/s / 5 s
acceleration = -4 m/s^2
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