x Turn on thread page Beta
 You are Here: Home >< Physics

# Conservation of momentum question watch

1. Hi,

I have a question that is from the A2 OCR Physics A text book. It is on page 13.

A basic air rifle fires slugs of mass 0.50g at a velocity 160ms⁻¹
a) If rifle has a mass 0.8kg and is free to move what is the recoil speed.
b) Normally the rifle is held, what mean force does the person experience to prevent the rifle recoiling more than 0.5mm when he fires it.

I have the answer to a) it is 0.1ms⁻¹, however I am not sure how to work out a force with this information?

Thanks
2. (Original post by BenRichi_)
Hi,

I have a question that is from the A2 OCR Physics A text book. It is on page 13.

A basic air rifle fires slugs of mass 0.50g at a velocity 160ms⁻¹
a) If rifle has a mass 0.8kg and is free to move what is the recoil speed.
b) Normally the rifle is held, what mean force does the person experience to prevent the rifle recoiling more than 0.5mm when he fires it.

I have the answer to a) it is 0.1ms⁻¹, however I am not sure how to work out a force with this information?

Thanks
Think about the deceleration of the rifle from the instant the slug is fired.

The question says on average so the rifle decelerates from 0.1m/s to 0 in a distance of 0.5mm.

Turn on thread page Beta
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 21, 2016
Today on TSR

### Loughborough better than Cambridge

Loughborough at number one

### Can I date a girl with no boobs?

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE