Question

A ball thrown upwards, returns to the thrower after 6
seconds with what speed does it return to the
thrower? [Take g = 10 m/s2)​

Answer 1

Answer:

30 m/s

Explanation:

1) Ball return to the thrower at the same speed as it was thrown.

Let the initial velocity be 'u' .

Time taken to return , t = 6s

Then , Final Velocity , v = -u.

Acceleration, a = -g=-10m/s^2

Using Newton's Equation of motion,

$v=u+at\\ \\=>-u=u-10*6\\ \\=>-2u=-60\\ \\=> u= 30m/s$

Hence, Speed of ball when it returns to the thrower is 30 m/s.