1) The velocity of a vehicle decreased from 30m/sec. to 15m/sec. in 5 seconds. What is the acceleration?
a) -4m/sec2 c) 2m/sec2
b) -3m/sec2 b) 1.5m/sec2
2) Periodic motions are---
i) Watch spines motion
ii) Electric fans motion
iii) Table's drawer motion
Which one is correct?
a) i,ii b) i,iii c) ii,iii d) i,ii,iii
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