Home > Subjects > Science > Level 1 > 1.1 Mechanics > Key tips
- Subject: Science
- AS: 90940
- Level: 1
- Credits: 4
- External
Science 1.1 Demonstrate understanding of aspects of mechanics
Key tips
- You should attempt all questions.
- Show all working of your calculations including any rearrangement of formulae.
- You should show your reasoning clearly and you may use numerical working, words, and/or diagrams.
- When working with formulae, always show all your working.
- Always use units in your answers.
- In calculations, don’t round your numbers too early. Round only at the final answer.
- Realise that no matter how fast something is moving, if it is travelling at a constant velocity, the total force acting on it is zero.
- If you get a question with a graph in it, make sure you understand what type it is: speed/time, or distance/time.
- Gradient of a distance/time graph is the speed; gradient of a speed/time graph is the acceleration, and the area under the line is the distance.
- If an object is accelerating, the total force acting on it can always be found using F=ma.
- Understand scientific notation.
- Be aware of the appropriate use of units. You may use both negative index (for example m s-2) and slash notation (for example m/s2) when writing units.
- You need to be able to calculate weight from mass, and vice versa, and that no formula is provided for this. Fg=mg is not given anymore.
