the velocity of a body moving in straight line with constant acceleration is 10 m/s.at a certain instant 't' after 5 sec the velocity become 20 m/s .velocity 3 sec before was?
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v=u+at
u+at=10
u+a(t+5)=20
eliminating,
a=2m/s2
v=u+at
10=u+2(t-(t-3))
10=u+2(3)
u=10-6
therefore,
u=4m/s
u+at=10
u+a(t+5)=20
eliminating,
a=2m/s2
v=u+at
10=u+2(t-(t-3))
10=u+2(3)
u=10-6
therefore,
u=4m/s
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