The problem involves a rifle firing a bullet and requires finding the recoil speed of both the rifle and a man holding it. The subject area includes concepts of momentum and forces in mechanics.
The discussion is ongoing, with participants providing hints and guidance on how to approach the problem. There is a focus on writing out equations and understanding the implications of initial conditions. Some participants express confusion regarding the setup and calculations.
Participants note the need to convert the weight of the rifle to mass and clarify the initial velocities of the system. There is an emphasis on ensuring all variables are correctly identified before proceeding with calculations.
Yep. That's all you need to solve both parts.mandy9008 said:momentum?
Sure. What's the initial velocity and momentum before the rifle is fired?mandy9008 said:m1v1i + m2v2i = m1v1f + m2v2f
Right. Keep going. You're given the final speed of the bullet.mandy9008 said:velocity and momentum is 0
Mass 2 is the mass of the rifle (at least in part a). You'll have to figure that out from the given information.mandy9008 said:okay, so it will be
mass 1 is 0.0055kg? then what is mass 2?
mandy9008 said:okay, so
m1v1i + (0.0055 kg) (0 m/s) = m1v1f + (0.0055 kg) (260 m/s)
I am confused now
You switched them around. You have m2 as the mass of the bullet, which means that m1 is the mass of the rifle (for part a). That's fine.mandy9008 said:okay, so
m1v1i + (0.0055 kg) (0 m/s) = m1v1f + (0.0055 kg) (260 m/s)
I am confused now