- #1
Molly1235
- 77
- 4
Hello, I am not sure if this thread is still active but I am doing the same kind of physics problem for homework, and I think I have come to a conclusion from all the helpful stuff on here, but just wondered if someone can check it over for me? This is not in my GCSE syllabus - my physics teacher just likes to set us O Level work, which is full of stuff no longer in our syllabus!
So the problem goes:
"A gun of mass 4.0kg fires a bullet of mass 10g at a speed of 60 m/s. What is the initital speed of recoil of the gun?"
First I thought I would have to convert both masses so they are in the same units, so I converted 4kg to 4000g.
From this thread I took
"(Mass of gun)*(Speed of Gun) = (Mass of Bullet)*(Speed of Bullet)" Please correct me if I am wrong here.
So I substituted in the numbers.
4000*? = 10*60
4000*? = 600
600/4000 = 0.15
Speed of recoil = 0.15 m/s
I have no idea if this is correct, please please give me a pointer in the right direction?
Thanks,
Molly.
So the problem goes:
"A gun of mass 4.0kg fires a bullet of mass 10g at a speed of 60 m/s. What is the initital speed of recoil of the gun?"
First I thought I would have to convert both masses so they are in the same units, so I converted 4kg to 4000g.
From this thread I took
"(Mass of gun)*(Speed of Gun) = (Mass of Bullet)*(Speed of Bullet)" Please correct me if I am wrong here.
So I substituted in the numbers.
4000*? = 10*60
4000*? = 600
600/4000 = 0.15
Speed of recoil = 0.15 m/s
I have no idea if this is correct, please please give me a pointer in the right direction?
Thanks,
Molly.