You are Here: Home >< A-levels

# M2 circular motion question watch

1. (Original post by misslili118)
that makes sense! thanks alot
Yay!
2. (Original post by Student403)
Yay!
when u go out with the m8s but mechanics is still life
3. (Original post by aymanzayedmannan)
when u go out with the m8s but mechanics is still life
So true
4. (Original post by Student403)
So true
Student403 aymanzayedmannan
I'm back with more questions :
1. A fairground ride consists of a rotating cylinder. People stand on the inside of the cylinder with their backs to it. When the speed of rotation is great enough the floor is lowered so that only friction stops them from falling. The diameter between a peron's body and the cylinder is taken as 0.5. Find the least angular speed necessary to stop a person from falling.

2. A child sits on a roundabout at a distance of 5 m from the centre of rotation and at a height of 2 m above ground level. The roundabout completes one revolution every 2 seconds. After one revolution the child drops a small toy, of mass 500 grams, that she was carrying, which then falls to the ground without hitting the roundabout.

(a) Find the acceleration of the child on the roundabout and the magnitude of the force exerted on the toy by the child, before she drops it. Hint: include the weight of the toy.

For the second question I found the acceleration but I got the magnitude wrong, I did f= ma using the previous answer which gave me 24.7 but the answer is 25.2.

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: March 26, 2016
Today on TSR

### Edexcel C3 Maths Unofficial Markscheme

Find out how you've done here

### 3,263

students online now

Exam discussions

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets