A body is projected vertically upward with speed 10 ,m / s and ot… - Vidyadip

MCQ

A body is projected vertically upward with speed $10 \,m / s$ and other at same time with same speed in downward direction from the top of a tower. The magnitude of acceleration of first body w.r.t. second is ...... $m / s ^2$ $\left\{\right.$ take $\left.g=10 \,m / s ^2\right\}$

✓
$0$
B
$10$
C
$5$
D
$20$

✓

Answer

Correct option: A.

$0$

a
(a)

The acceleration of first body

$a_1=10 \,ms ^{-2}$

$a_2=10 \,ms ^{-2}$

$a_{ rel }=a_1-a_2=10 \,ms ^{-2}-10 \,ms ^{-2}=0$

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$K_h :$ kinetic energy at the highest point