A car starts from rest and attains a velocity of 10m/s in 40 seconds. The driver applies brake and slows down the car to 5m/s in 10 seconds. Find the retardation of the car in both the cases.
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ɢıvεŋ
A car starts from rest and attains a velocity of 10m/s in 40 seconds. The driver applies brake and slows down the car to 5m/s in 10 seconds.
Tσ Fıŋɖ
Find the retardation of the car in both the cases
Sσɭutıσŋ
As we know that
In first case
A car starts from rest and attains a velocity of 10m/s in 40 seconds.
- v = 10m/s
- u = 0m/s
- t = 40sec
➦ a = (v - u)/t
➦ a = (10 - 0)/40
➦ a = 10/40
➦ a = 1/4
➦ a = 0.25m/s
In second case
The driver applies brake and slows down the car to 5m/s in 10 seconds
- v = 5m/s
- u = 10m/s
- t = 10
➦ a = (v - u)/t
➦ a = (5 - 10)/10
➦ a = -5/10
➦ a = -1/2
➦ a = - 0.5m/s
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