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SingaporePhysics

Measurement and Kinematics

3 dot points across 3 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What do distance-time and speed-time graphs tell us about motion, and how do objects fall under gravity?

Interpret distance-time and speed-time graphs, and describe free fall and the effect of air resistance
Read distance-time and speed-time graphs, find speed from a gradient and distance from an area, and describe how objects fall under gravity with and without air resistance at N(A)-Level.
8 min answer →

How do we measure physical quantities, and why does every measurement need a unit and a sensible precision?

State the SI base quantities and units, use common prefixes, and choose suitable instruments to measure length and time
How to state the SI base quantities and units, use prefixes such as kilo and milli, convert units, and pick the right instrument to measure length and time at N(A)-Level.
7 min answer →

How do we describe how fast something moves and how quickly its motion changes?

Define speed, velocity and acceleration, and calculate each using simple one-step formulas
Define speed, velocity and acceleration, tell the difference between speed and velocity, and use the formulas for average speed and acceleration with simple N(A)-Level numbers.
8 min answer →