Question

Two objects of masses 200 grams and 400 grams are moving along the same line and direction with velocities of 4 metre per second and 2 metre per second respectively they collide and after the collision the first object moves at a velocity of 3.34 metre per second determine the velocity of the second object

Answer 1

there is no mention of type of collision.

please use momentum conservation which is true for every collision

m1= 200g

m2 = 400g

u1=4m/s

u2= 2m/s

v1=3.34m/s

v2=?

use m1u1 + m2u2= m1v1+ m2v2

200*4+400*2= 200*3.34 +400*v2

v2= 2.33m/s

Answer 2

m1= 200g = 200÷1000 = 0.2kg

m2= 400g = 400÷1000 = 0.4kg

u1 = 4m/s

u2 = 2m/s

v1 = 3.34m/s

v2=?

m1u1 + m2u2 =  m1v1 + m2v2

0.2×4 + 0.4×2 = 0.2×3.34 + 0.4×v2

0.8 + 0.8 = 0.668 + 0.4 v2

0.16 - 0.668 = 0.4 v2

-0.508÷0.4 = v2

-1.27m/s = v2

HOPE THE ANSWER IS HELPFUL TO YOU:)