Question

wanna these question's answer in 5 minutes​

Answer 1

These are the questions based on Principles of Conservation of linear momentum

I.e

initial momentum = final momentum

m1v1=m2v2

1) 10 x v = 10/1000 x 300

=10xv=3

=v=3/10 = 0.3m/s

2)We don't have enough data given here for initial velocities. So I am taking v1=20m/s and v2=0m/s (assuming that it is as at rest).

Now, after collision, let the mass be m1+m2 and velocity be v

Then, (m1+m2)v= m1v1+m2v2

= 2500 v = 1500 x 20 + 1000 x 0

= v= $\frac{1500x20}{2500}$

V=12m/s

3) Do on ur own, I am getting late for school.