PHYSICS FORM 4 REVISION

Chapter 1: Introduction to Physics

1. Which of the following unit conversions is not correct?A 230 Ms = 2.3 x 108 sB 360 ms = 3.6 x 10-1 sC 0.0013s = 1.3 msD 2.34 x 105 s = 23.4 ks

2. Which of the following unit conversions is correct?A 2.5 m2 = 250 cm2

B 5.6 m3 = 560 cm2

C 4500 cm2 = 45 m2

D 2.5 x 107 cm3 = 25 m3

3. Table above shows the measurements of the thickness of form 4 Physics textbook made by 4 students Joslina, Valentina, Nee Na and Mina. Which set of the readings is consistent but less accurate? (Assume that the actual reading of the thickness is 1.92 cm.)A JoslinaB Nee NaC ValentinaD Mina

4. Figure (a) above shows the zero error of a vernier calliper. Figure (b) shows the reading on the vernier calliper when measuring the length of an object. Find the correct reading of the measurement.A 2.03 cmB 2.07 cmC 2.05 cmD 2.15 cm

5. A student was asked to measure the thickness of a sheet of paper. The diagram shows the reading on a micrometer when he measured the thickness 50 sheets of similar paper. What is the thickness of the paper?A 4.44 mmB 4.44 cmC 0.089 mmD 0.089 cm

Chapter 2: Force and Motion

6. An object accelerates from stationary with the acceleration of 4 ms-2. What is the velocity of the object after 7s?

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7. How fast will the balls move if this is:(a) Elastic collision?

(b) Inelastic collision?

What is the principle used?

8. A boy with 30 kg is standing on a weighing balance in the lift. What is the reading if the lift:(a) moves upwards at an acceleration of 2 ms-2?

(b) moves downwards at an acceleration of 5 ms-2?

(c) stop suddenly?

(d) break suddenly?

9. A worker is pulling a 10 kg box with a force of 50 N, by making 60° from a frictionless the floor. (a) What is the acceleration of the box?

(b) What is the acceleration of the box if the box is pulled on the rough surface with 5 N friction.

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10. A mango falls from a height of 6 m. What is the velocity of the durian just before it strikes the ground?State the principle used.

Chapter 3: Pressure

11. The pressure of a lake water at the bottom is 5 x 104 Pa. What is the depth of the lake?

12. What is the pressure of methane gas in tank if the h is 10 cm?Notes: the liquid in the manometer is mercury and the manometer is opened to the atmosphere.

13. A basic hydraulic system has small and large pistons with cross sectional areas of 10 cm2 and 100 cm2 respectively. When a force of 50 N is applied to the small piston, calculate (a) the pressure transmitted in the hydraulic fluid

(b) the force acting on the large piston

14. A cube with 1 cm each side weighs 1 N in air. Find the apparent weight in a liquid of density 5000 kgm-3.

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Chapter 4: Heat

15. 2 kg boiling water is pour into another 4 kg solution with 50℃ and specific heat capacity of 2000 J kg-1℃-1. Calculate the final temperature of the mixture when thermal equilibrium is reached.

16. A closed flask contains gas at temperature of 150℃ and a pressure of 120 kPa. If the temperature rises by 25℃, what is the new pressure of the gas?

Chapter 5: Light

17. Find the refractive index.

18. (a) What is the critical angle?

(b) Find the refractive index.

Draw on graph paper for question 19 and 20.

19. The power of a lens is +5 D. If the object is located on located 25 cm from the lens, draw the ray digram and determine the characteristic of the image formed.

20. The focal length of a lens is -30 cm. (a) Find the power of the lens.(b) If the object is located on located 25 cm from the lens, draw the ray digram and determine the characteristic of the image formed.

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