## A pillow is thrown downward with an initial speed of 6 m/s. After 4 seconds, the pillow’s velocity is m/s. (g= -9.8m/s2)

Question

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## Answers ( )

Given :Initial velocity, u = -6 m/s.

Time taken, t = 4 seconds.

Acceleration due to gravity, .( Here negative sign means downward direction )

To Find :Velocity after 4 seconds.

Solution :By equation of motion.

v = u + at

Here , a = g.

v = u + gt

v = -6 + (-9.8)×4

v = -6 + (-39.2)

v = -45.2 m/s

Therefore, velocity after 4 seconds is -45.2 m/s.

Hence, this is the required solution.