Question

A ball is projected from the ground at a speed of 30m/s. Average speed?

Answer 1

averagevelocity=

totaltime

finalvelocity−initialvelocity

​

v:−finalvelocity(velocityat4

th

second)

v=u+at

v=30−10×4

v=−10ms

−

averagevelocity=

−10−30/4

​

-40/4

= -10

Hope it will help you‼️