Mechanics Overview

Question 1

What does modelling a pulley as smooth do?

Answer 1

Make the tension on either side of the pulley equal

Question 2

What does modelling a string as light to?

Answer 2

Make the tension equal throughout the string

Question 3

What does modelling a string as inextensible do?

Answer 3

Both particles connected have the same acceleration.

Question 4

What does modelling something as a particle do?

Answer 4

Allows you to ignore air resistance and rotational effects

Question 5

What does modelling something as a rod do?

Answer 5

Make it rigid - no bending, no thickness

Question 6

What does equilibrium mean?

Answer 6

Forces are balances - up/down and left/right are equal to each other.

Question 7

How can you prove equilibrium with vector forces?

Answer 7

Add together, will equal 0.

Question 8

What is friction when static?

Answer 8

Less than or equal to uR

Question 9

What is friction when in limiting equi / acceleration?

Answer 9

F = uR

Question 10

Is there an upper limit to u?

Answer 10

No! Apparently