Question

An object moving along a straight line at 40 ms^-1 undergoes an acceleration of 5 ms^-2 . After two seconds its velocity will be (a) 50 ms^-1 (b) 30 ms^-1 (c) 25 ms^-1 (d) 40 ms^-1​

Answer 1

Answer:

Given : u = 5 m/s

t =4s

a = -2.5 m/s2

Displacement S = ut +rat

.. S = 5 X 4+ 5 (-2.5) (4)2 =0m