Question

Can anyone give me the solution for this??​

Answer 1

Explanation:

So the formula for linear momentum,

ρ

, is

ρ

=

m

v

.

So before the collision, the momentum of the system is

10000

⋅

15

=

150000

k

g

m

s

−

1

.

After the collision, the momentum, according to the law of conservation of momentum, remains the same. That is,

ρ

1

=

ρ

2

, or

m

1

v

1

=

m

2

v

2

Here,

v

2

=

m

1

v

1

m

2

m

1

v

1

=

150000

, we know this from our prior calculations. Now, since the second carriage gets stuck to the first one, the mass of the system,

m

2

, is equal to

20000

k

g

v

2

=

150000

20000

v

2

=

7.5

m

s

−

1