A car acquires a velocity of 72 km/h in 10 seconds starting from rest find acceleration
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Data:
Vi= 72 km/h Vi= 72ooo/ 3600 = 20 m/s
we have to convert km into m and h into sec
as 1km= 1000m and 1 hour = 3600 sec
Vf= 0
t = 10 sec
Required:
a= ?
Solution
According to 1st equation of motion
Vf= Vi + at
0 = 20 + a ( 10 )
- 20 = a (10)
-20 / 10= a
a = -2 m/sec^2
Vi= 72 km/h Vi= 72ooo/ 3600 = 20 m/s
we have to convert km into m and h into sec
as 1km= 1000m and 1 hour = 3600 sec
Vf= 0
t = 10 sec
Required:
a= ?
Solution
According to 1st equation of motion
Vf= Vi + at
0 = 20 + a ( 10 )
- 20 = a (10)
-20 / 10= a
a = -2 m/sec^2
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