1. To continue our work on resolving forces
Solve problems involving
Resultant force = mass x acceleration
Solve problems on an inclined plane

2. Example
A go kart has a rocket attached to it of mass 78kg (with driver). The go kart is travelling at a constant speed of 4ms-1, at which point the rocket fires and the go kart experiences a driving force of 450N and drag forces of 280N. Calculate
The resultant force acting on the go-kart
The acceleration of the go-kart
The final speed of the go-kart if it continues to accelerate at this rate for 5 seconds

3. You try
Sheet of questions on resolving forces

4. Example – inclined plane
Find the magnitudes of friction and normal reaction for the book at rest on the desk?
Weight of the book is 8N
Desk is tilted at an angle of 15°

5. Sidney is very disappointed when his sledge gets stuck half way down the hill!
If the hill is sloped at an angle of 12° and the combined weight of Sidney and his sledge is 400N, calculate the magnitude of the normal reaction and frictional forces.

6. You try
Sheet of questions on resolving forces on an inclined plane

7. Fast finishers
Try the exam questions

8. Homework