Question

A ball is thrown vertically up with a certain velocity. It attains a height of 40 m and comes back to the thrower. Then choose the incorrect options :(g = 10m/s2)

(A) The average speed of the ball for the round trip is zero.

(B) total displacement is 80 m

(C) total displacement is zero

(D) the average velocity for round trip is non zero

Answer 1

Correct option (A) The average speed of the ball for the round trip is zero.

(B) total displacement is 80 m

(D) the average velocity for round trip is non zero

Explanation:

Displacement = 0 ( initial position = final position)

average velocity = 0 (Total displacement = 0)