Chapter 5 Forces And Friction - Year 2 Flashcards
What can forces do?
How do you split forces?
Trigonometry
What is the general method for applied maths when working with forces?
Compare the vertical and horizontal forces separately to find resultant force
What do you need to remember when doing inclined planes?
R is always perpendicular to the plane
The sin component of the force always acts down the slope
What tip can help with time in an exam when doing inclined planes/splitting forces?
If the angle is 30 or 60 don’t write sin30 or cos60. Write 1/2.
In what direction does friction act?
It always opposes motion parallel to the plane
How do you calculate friction?
What does it mean if the coefficient of friction is 0?
There is no friction and the surface is smooth
Explain this graph:
When the force acting on the object is less than the maximum value of friction friction matches that force.
When the force applied to an object is equal to the max force of friction the object is at limiting friction
When the force applied is greater than the max force of friction then there is acceleration (assuming there is no other forces)
