Demo. An invented family, made-up minutes, nobody's real child. The quizzes work: pass a round and watch the clock change.

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⚛️ Physics, NCEA

Years 11 to 13 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. Newton's first law states that an object will remain at rest or move at constant velocity unless

acted on by an unbalanced (net) forceit runs out of energyit is touched by another objectgravity stops acting on it

2. Refraction is the

bending of light as it passes from one medium into anothersplitting of light into colours onlyabsorption of light by a black surfacebouncing of light off a surface

3. The nucleus of an atom contains

protons and electronsprotons and neutronsonly electronsonly protons

4. Which quantity describes how fast an object's velocity is changing?

DisplacementMassSpeedAcceleration

5. The distance between two successive wave crests is called the

frequencywavelengthamplitudeperiod

6. Momentum is calculated as

force times timemass divided by velocitymass times velocitymass times acceleration

7. Sound waves are

only able to travel through a vacuumnot waves at alltransverse waves, where particles vibrate perpendicular to the direction of travellongitudinal waves, where particles vibrate parallel to the direction of travel

8. Light bends towards the normal when it travels from

a less dense medium (like air) into a more dense medium (like glass)a more dense medium into a less dense mediumglass into more glassvacuum into vacuum

9. A 2 kg object moves at 5 m/s. What is its momentum?

7 kg m/s2.5 kg m/s5 kg m/s10 kg m/s

10. For an object moving in a circle, the centripetal acceleration points

in the direction of travelaway from the centre of the circletowards the centre of the circleopposite to the direction of travel

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