Magnitude of average force exerted by each particle on other

[TRVSA]

Homework Statement

A particle of mass 5.0kg travels initially with a velocity of 8.0m/sˆı and then interacts with a particle of mass 6.0kg which was initially at rest. After the interaction the 5.0kg mass travels at a speed of 4.0m along a direction which makes an angle of 53◦ with the x-axis as illustrated.

1. If the interaction took 0.2s, what was the magnitude of the average force exerted by each particle on the other?
   

Homework Equations

F = I/Δ t
I = ΔP

The Attempt at a Solution

I found the angle between x-axis and second particles velocity (30 degrees) and the speed of the second particle after interaction (5.4m/s). And now I am unsure whether to take the average of the masses and velocities of both particles or what

 

[haruspex]

Homework Statement

A particle of mass 5.0kg travels initially with a velocity of 8.0m/sˆı and then interacts with a particle of mass 6.0kg which was initially at rest. After the interaction the 5.0kg mass travels at a speed of 4.0m along a direction which makes an angle of 53◦ with the x-axis as illustrated.

1. If the interaction took 0.2s, what was the magnitude of the average force exerted by each particle on the other?

Homework Equations

F = I/Δ t
I = ΔP

The Attempt at a Solution

I found the angle between x-axis and second particles velocity (30 degrees) and the speed of the second particle after interaction (5.4m/s). And now I am unsure whether to take the average of the masses and velocities of both particles or what

Take a tip from the relevant equations you posted. What is ΔP here?

 

[TSny]

Another tip: You can answer the question without knowing anything about the second particle.

 

[TRVSA]

Take a tip from the relevant equations you posted. What is ΔP here?

change in momentum?

 

[haruspex]

change in momentum?

Yes, that is what it means, but what is its value in this question?