Two balls are projected upward simultaneously with speeds 40 ,m /… - Vidyadip

MCQ

Two balls are projected upward simultaneously with speeds $40 \,m / s$ and $60 \,m / s$. Relative position $(x)$ of second ball w.r.t. first ball at time $t=5 s$ is .......... $m$ [Neglect air resistance].

A
$20$
B
$80$
✓
$100$
D
$120$

✓

Answer

Correct option: C.

$100$

c
(c)

$S_{ rel }=U_{ rel } t+\frac{1}{2} a_{ rel } t^2$

$\Rightarrow S_{ rel }=(60-40) 5 \quad\left(a_{ rel }=0\right)$

$\Rightarrow S_{ rel }=100 \,m$

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