1
Q
Force?
A
F=ma
With F being the resultant force
2
Q
Weight?
A
W=mg
With g being positive towards the earth
3
Q
What is the resultant force if the object is in equilibrium?
A
Zero
4
Q
What is friction?
A
The force which opposes motion
5
Q
What is the normal reaction force?
A
The force which is perpendicular to contact
6
Q
How do you calculate acceleration of a car and a trailer?
A
Form two force diagrams one for car, one for trailer
Create two simultaneous equations with F=ma for each
7
Q
Moments?
A
Force x distance
8
Q
Friction?
A
f = μR μ = coefficient of friction R = Normal force
Maths A Level
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