You are Here: Home >< Maths

# A2 maths Mechanics Watch

Announcements
1. A block of mass 5kg is held at rest on a smooth slope inclined at 30degrees to the horizontal, using a string which makes an angle of 20degrees with the plane. the tension in the string is?

Any help with this would be great, does the angle of the first initial incline included?
cheers
2. (Original post by POISIDON)
A block of mass 5kg is held at rest on a smooth slope inclined at 30degrees to the horizontal, using a string which makes an angle of 20degrees with the plane. the tension in the string is?

Any help with this would be great, does the angle of the first initial incline included?
cheers
Start by drawing a diagram. You could see that gravitational force along the incline is 5g times sin30 degrees. This is the force which should be applied in the direction along the plane by the string. Hence, T cos 20 = 5g sin 30. Solve this equation to get T.
3. (Original post by tangotangopapa2)
Start by drawing a diagram. You could see that gravitational force along the incline is 5g times sin30 degrees. This is the force which should be applied in the direction along the plane by the string. Hence, T cos 20 = 5g sin 30. Solve this equation to get T.
Thank you very much
4. (Original post by POISIDON)
Thank you very much
Np!!

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: October 2, 2016
Today on TSR

### Oxbridge

Even more elitist than everyone thought?

### Physically ill after being cheated on

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.