Question

Plz answer for this mcq

Answer 1

Answer:

The answer would be (a) 4.5m/s

Explanation:

Applying law of conservation of linear momentum(p):-

Initial p= final (p)

m1u1 + m2u2= m1v1 + m2v2

2(6)+ 3(-4) = 2(v)+ 3(3)

0= 2v +9

v= 9/2 =4.5m/s

P.S. acc to ques the masses travel towards each other, hence velocity of one of them has to be negative.

Hope it helps ya:)

Answer 2

Answer:

a) 4.5

Explanation:

We can solve this by using the law of conservation of momentum:

$m_{1}=$ 2 kg

$m_2 =$ 3 kg

$u_1 =$ 6 m/s

$u_2 =$ -4 m/s

$v_1 =$ ??

$v_2 =$ 3 m/s

$m_1u_1+m_2u_2=m_1v_1+m_2v_2$

(2*6)+ (3*-4) = 2$v_1$ + 3*3

12-12= $2v_1$ + 9

0 = $2v_1$ + 9

-9 = $2v_1$

$v_1$ = -9/2

$v_1$ = 4.5 KGM/S

THEREFORE YOUR ANSWER IS A

PLS MARK AS BRAINLIEST ANSWER ✌

I HOPE IT HELPS :)

PLS REFER TO @priyanca 's answer above for more details

she has answered it amazing!! :)