A piece of metal has attained a velocity of 107.8 m/sec after fallinf for 10 seconds what is its initial velocity

7.8 m/s

Explanation:

Here object is falling with a gravitational acceleration there for we can take acceleration = 10 m / s² and its constant through out the motion there for we can use motion equation

V = U + at

V - Final velocity

U - Initial velocity

a - acceleration

t - time

V=U+at

107.8=U + 10*10

= 7.8 m/s