Physics · Practice test

SS 3 practice test

18 questions + 2 written tasks. Answers and your score show when you submit the whole test.

How it works: answer every question as you would in an exam, then submit to see the answers and your score. For written answers, compare yours with the model answer and mark it honestly: that is where the learning happens.

0 of 18 answered

1. What is a projectile?
2. Why does the horizontal component of a projectile's velocity stay the same throughout its flight?
3. A ball is projected at 20 m/s at 30° to the horizontal. Find (i) the time of flight (ii) the maximum height (iii) the horizontal range.
4. What is Brownian motion?
5. State two inferences that can be drawn from a Brownian motion experiment.
6. A force of 20 N acts on a 4 kg body initially at rest. Find its acceleration and its velocity after 3 s.
7. A 0.2 kg ball moving at 10 m/s hits a wall and rebounds at 8 m/s. Contact lasts 0.05 s. Find the change in momentum and the average force on the ball.
8. Give two examples of rotational motion.
9. Describe a laboratory experiment to determine the density of an irregularly shaped solid.
10. State Newton's second law of motion.
11. At the highest point of its path, a projectile has
12. Which is an example of translational motion?
13. The SI unit of momentum is
14. A stone of mass 60 g raises the water level in a measuring cylinder from 40 cm³ to 64 cm³. Find its density.
15. One ball is dropped and another is projected horizontally from the same height at the same instant. Analyse which reaches the ground first.
16. A student finds the volume of a small stone as 5 cm³ using a measuring cylinder read to the nearest 1 cm³. Evaluate the reliability of the result and suggest two improvements.
17. Design an experiment to investigate how the angle of projection affects the horizontal range of a projectile.
18. (new, AI literacy) An AI chatbot says: "A 2 kg ball projected horizontally lands before a 1 kg ball projected at the same speed from the same height, because heavier objects fall faster." Evaluate this claim.

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Written tasks

Not part of the score above. Write your answer here or on paper, then you, a parent or a teacher can mark it with the marking guide.

1. Explain why the path of a projectile is curved, derive expressions for its time of flight, maximum height and range, and use them to solve a problem of your choice. (9 marks)
2. Describe a smoke-cell experiment to demonstrate Brownian motion, state what is observed, and explain what it shows about the kinetic theory of matter, including the effect of temperature. (9 marks)