Question

In a closed system, Glider A with a mass of 0.40 kg and a speed of 10.00 m/s collides with Glider B at rest with a mass of 1.20 kg. The two interlock and move together. What speed are they moving?
10.0 m/s
0.5 m/s
2.5 m/s
1.0 m/s

Answer 1

[Physics]

First we need to figure out the collision type. If they interlock and move together, is it a elastic or inelastic collision?

Answer 2

inelastic
@FortyTheRapper

Answer 3

Right:
Since momentum is conserved and they didn't move at a certain angle, we can use

\[(m _{1}v _{1})+(m _{2}v _{2}) = (m _{1}+m _{2})v _{f}\]

Answer 4

okay. how do I plug that in?

Answer 5

Let:

\[m _{1}=GliderA\]
\[m_{2} = GliderB\]

Answer 6

(.40*10)+(1.20*v2)=(.40+1.20)vf

Answer 7

All that is right.
We know v2 though:

collides with Glider B ~~at rest~~~

Answer 8

so v2 would be 0?

Answer 9

Yep

Answer 10

(.40*10)+(1.20*0)=(.40+1.20)vf
4+0=(1.60)vf
4=1.6vf
2.5=vf

Answer 11

Looks good to me

Answer 12

thank you!!)))

Answer 13

Anytime