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SingaporeCombined ScienceQuick questions
Physics: Measurement, Forces and Energy
Quick questions on Forces and motion explained: O-Level Combined Science
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are reading motion graphs?Show answer
On a distance-time graph the gradient is the speed: a steeper line means faster, a horizontal line means stationary. On a speed-time graph the gradient is the acceleration, and the area under the line is the distance travelled. A horizontal line on a speed-time graph means constant speed (zero acceleration).
What is q1?Show answer
State Newton's first law of motion. [2 marks]
What is q2?Show answer
A trolley experiences a resultant force of . Find its acceleration. [2 marks]
What is q3?Show answer
Explain why an astronaut has the same mass but a smaller weight on the Moon. [2 marks]
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