10.4 motion in 2 dimensions, 10.5 connected particles, 10.6 pulleys

What can you use to solve problems involving vector forces acting on particles?

F=ma

Example 8

Example 9

Example 10

How can you solve problems involving connected particles?

• By considering the particles separately

• If they are moving in the same straight line, you can consider them as one particle

What do the particles need to be like to be considered as a single particle?

• Need to remain in contact or

• Be connected by an inextensible rod or string

Example 11a

Example 11b,c

What is Newtons 3rd law?

Example 12a,b

Example 12c

Pulleys recap

What does it mean when the particles are connected by a light inextensible string, which passes over a smooth pulley?

The tension in the string will be the same on both sides of the pulley

Why can you not treat a system involving a pulley as a single particle?

Because the particles are moving in different directions

Example 13 a,b

Example c,d,e,f

Example 14 part 1

Example 14 part 2