Question

A body moving along a straight lineat 20ms'-1' undergoes an accelaration of4ms'-2' . After2 second what will be its speed? Also find its displacement.

Answer with solution
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Answer 1

Answer:

v = 28 m/s

s = 48 m

Explanation:

Initial speed, u = 20 m/s

Acceleration, a = 4 m/s²

Time, t = 2 s

Now, let the speed of the body after 2 s be 'v' m/s and its displacement be 's' m.

Using,

v = u + at

v = 20 + 4(2)

v = 20 + 8

v = 28 m/s

Using,

s = ut + 1/2 at²

s = 20(2) + 1/2 (4)(2)²

s = 40 + 8

s = 48 m

Thus the speed of the car after 2 s is 28 m/s and the displacement is 48 m.

Hope it helps!!!