Question

A body is projected vertically upwards. What is the relation between the magnitude of velocity(v) of the body on reaching the point of projection in its downward motion to velocity of projection(u) ?

• A. v < u
• B. v > u
• C. v = u
• D. None of the above

Answer 1

Answer: (C)

v = u

From third equation of motion, $v^2=u^2+2as$

Given: $a=-g,s=0$

Substituting the above values, we get
$v^2=u^2$

$v=\pm u$

$|v|=|u|$