Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter

    How is the angle between the tangent line and direction of vo equal to the angle moved by point A (which is initially below O)?

    [See Figure 1]

    It does make sense 'visually.' If \theta = \frac{\pi}{2}, it is evident that both will have right angles. Same goes when it is 0, pi, and so on...

    But what is the geometrical proof behind this? E.g., using parallel lines, perpendicular lines, corresponding angles, vertical angles, etc...

    Figure 1


    Out of curiosity, how much energy due to friction is lost when a wheel rotates on a ground?
    • Study Helper

    Study Helper
    (Original post by Alpha-Omega)
    Out of curiosity, how much energy due to friction is lost when a wheel rotates on a ground?
    Updated diagram is self explanatory I think.

    Re. your last question. None, when the surface is horizontal and the wheel is moving with constant speed.
    Attached Images
Submit reply
Turn on thread page Beta
Updated: April 10, 2013
Do you agree with the proposed ban on plastic straws and cotton buds?
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

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

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