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

# Physics help -_- watch

1. So this is the question;
Road accidents involving children could be reduced by reducing the speed limit outside a school to 20 mph. Discuss the effect this would have on the road safety near a school where the speed limit is currently 30 mph.

AND this is the answer I put;
If the car, travelling at 30 mph were to hit a child, the force would e much greater as the acceleration would be greater as -u^2/2s would be -11.25m^-2. Also taking into account the thinking distance and breaking distance, the thinking distance would be twice the velocity but braking distance is squared the velocity, therefore taking longer to stop.

Now i'm too sure about this answer that I have given,and think i'm missing a few points so if there's any fault in it or any extra info I can add please don't hesitate

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: April 13, 2013
Today on TSR

### Boyfriend slept with someone else

...we were on a break

### Mum says she'll curse me if I don't go to uni

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