Question

A ball thrown up vertically returns to thrower after 10 seconds. Calculate:
a) The velocity with which it was thrown upwards.
b) The maximum height it acquired.
c) Velocity with which it hits the ground

Answer 1

Explanation:

Mother said to her daughter, ‘ Your exams are approaching fast “ Shashi said to her mother , ‘ Are you worried about my result ? “ Mother said to her daughter ,” Do you know that last time you got less marks

Change into direct speech

Answer 2

Answer:

The ball returns to the ground after 6 seconds.

Thus the time taken by the ball to reach to the maximum height (h) is 3 seconds i.e t=3 s

Let the velocity with which it is thrown up be u

(a). For upward motion,

v=u+at

∴ 0=u+(−10)×3