Velocity time graph of a particle in straight line motion is in shape of a semicircle of radius R as shown in figure. Its average acceleration from t=0 to t=R is
A
0m/s2
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B
1m/s2
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C
Rm/s2
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D
2Rm/s2
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Solution
The correct option is B1m/s2 From the figure it is clear that u=0 and v=R (at t=R) We know that average acceleration is given as aavg=ΔvΔt=v−ut=R−0R=1m/s2