Question

In a head-on elastic collision of two bodies of equal masses
$\left(i\right)$ The velocities are interchanged
$\left(ii\right)$ The speeds are interchanged
$\left(iii\right)$ The momenta are interchanged
$\left(iv\right)$ The faster body slows down and the slower body speeds up

• A. $\left(i\right),\left(ii\right)$
• B. $\left(i\right),\left(ii\right),\left(iii\right)$
• C. $\left(i\right),\left(ii\right),\left(iv\right)$
• D. All options are correct

Answer 1

The correct option is D All options are correct

Hint: “Head-on elastic collision”

Formula used:

$P_i=P_f$

$e=\frac{v_2-v_1}{u_1-u_2}$

Solution:

Given,
As there is no external force acting on the system hence linear momentum of the system remains conserved in magnitude and direction, so the velocities get exchanged between two bodies. So, all options are correct.

Final Answer: $\left(d\right)$.