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Question

A body moves along a straight line with acceleration 3 ms2 for 2 seconds and then with acceleration 4 ms2 for 3 seconds. What is his average acceleration?

A
3.4 ms2
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B
3.5 ms2
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C
3.6 ms2
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D
3.7 ms2
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Solution

The correct option is C 3.6 ms2
Given : a1=3m/s2 t=2 s and a2=4m/s2 t=3 s
Average acceleration aavg=a1t1+a2t2t1t2
aavg=3×2+4×32+3=3.6 m/s2

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