Question

A body is projected vertically up with a velocity v and after some time it returns to
the point from which it was projected. The average velocity and average speed of
the body for the total time of flight are
(1) v/2 and v/2 (2) 0 and v/2 (3) 0 and 0 (4) v/2 and 0

Answer 1

Explanation:

Since displacement = 0

Average velocity = 0

Trick Suddenly click option  2

Average speed = total distance / total time

      t = 2u / g  and s = 2 u²/ 2g

                          = u / 2

                           Hope you understand

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Answer 2

A. Displacement=0

Hence, velocity=0

B.

Distance travelled is twice the height

=h(upward)+h(downward)

=(v²/2g)+ (v²/2g)

= v²/g

Time taken= v/g+ v/g

= 2v/ g

Average speed= distance/time

(After this you can solve)

average speed

verage speed =V/ 2

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