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Q.

A car is moving with a speed of 30m/s on a circular path of radius 500m.if the speed is increasing at the rate of 2m/s2 the net acceleration of the car is 

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a

2.7 m/s2

b

3.6 m/s2

c

2 m/s2

d

1.8. m/s2

answer is B.

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Detailed Solution

a=at2+ac2

at=rα=2m/s2

ac=v2r=302500=1.8m/s2

⇒a=22+1.82=2.7m/s2

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