1. V = Vo + at.
20 + 4*2 = 28m/s.
2. d = Vo*t + at^2.
d = 20*2 + 4*2^2 = 56m.
a body moving along a straight line at 20 m/s undergoes an acceleration of 4 metre per second square.after two seconds what will be its speed? also, find the displacement .
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