A car accelerates from rest to a speed of 36 km/h in 20 seconds. What is the acceleration of the car in m/s2? (0.4m/s2)
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Answer:
Given:
u=0
v=36km/hr
t=20 seconds
To Find:
a=?
solution:
According to Newton's first law of motion,
v=u+at
36=0+a×20
36=20a
a=36/20
a=18/10
a=1.8m/s²
Therefore, acceleration of the car is 1.8 m/s².
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