Question

Two spherical balls are 2.0 kg and 3.0kg masses are moving towards each other with velocities of 6m/s and 4m/s respectively what must be the velocity of the smaller body after collision if the velocity of the bigger ball is 3m/s?
a)1.5
b)2.5
c)3.5
d)4.5
e)5.5
(with solution)
​

Answer 1

Answer:

(D) 4.5

Explanation:

According to the law of conservation of momentum,

m1u1−m2u2=m1v1−m2v2  

2×6−3×4=2×v1−3×3  

12−12=2v1−9  

2v1=9  

v1=4.5  

The velocity of the smaller ball after collision will be 4.5 m/s. But in the opposite direction of the first body.

$Hope$  $Helps!!!!$

$Mark$ $\beta rainlist!!@@@$