A car start from rest and acquire a velocity of 54 km/h in 2 second . find the acceleration . The distance travelled by car
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As the car is starting from rest,
Initial velocity = u=0m/s
Final velocity = v=54km/hr
To convert km/hr to m/s, we multiply it by 5/18
Final velocity = v=54km/hr=54×5/18=15m/s
Time = t=2 sec
a = acceleration
Equation of motion:
v=u+at
15=0+2a
a=15/2=7.5m/s^2
s = distance travelled
Equation of motion:
s=ut+1/2at^2
=0+1/2×7.5×2^2
=15 metres
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