Forces

Question 1

Static/at rest/constant speed/on the point of slipping

Answer 1

Forces are balanced horizontally and vertically

Question 2

Force =

Answer 2

mass x acceleration

Question 3

What does friction always oppose?

Answer 3

The direction of motion/it will move in

Question 4

Friction if static

Answer 4

F<= uR

Question 5

Friction in limiting equlibrium

Answer 5

F = uR

Question 6

What is the coefficient of friction between?

Answer 6

0 and 4 ish

Question 7

Connected particles method

Answer 7

Use F = ma
Make simultaneous equations
Use suvat to find after string breaks
New acceleration, t = 0
Use SUVAT again with new a

Question 8

Moments =

Answer 8

force x perp distance OR perp force x distance

Question 9

Moments method

Answer 9

Resolve up down
Resolve left right
Take moments about A

Question 10

On the point of tilting about A meaning

Answer 10

RB = 0