Everything Science Grade 11

CHAPTER 12. FORCE,MOMENTUM AND IMPULSE 12.2

Example 1: Force diagrams

QUESTION

Draw a labelled force diagram to indicate all the forces acting on trailer A in the example

above.

SOLUTION

Step 1 : Draw a large diagram of the picture from yourquestion

Step 2 : Add all the forces

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Step 3 : Add the labels

Ff: Frictional force F 1 : Force of car on trailer A(to the right)

FN: Upward force of road ontrailer A

Fg: Downward force of Earth on trailer A

FB: Force of trailer B

on trailer A (to the left)

A