Practice MCQs For Mass, Weight and Density, Work, Energy and Power

This quiz contains practice questions for GCE ‘O’ level topics: Mass, Weight and Density, Work, Energy and Power. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

Back To O Level Physics

Back To List of O Level Physics Quiz

Enter email to receive results:

1. A mass hangs on a string fixed at point P. It starts from position 1 and swings to the furthest position on the opposite side, position 2. It then oscillates several times with decreasing amplitude before ending at position 3.

Where does the ball have the most kinetic energy?

At position 1

At position 2

The first time at position 3

The last time at position 3

2. An object that has a mass of 15 kg on the Earth is taken to the Moon.

The gravitational field strength on the Earth is $10 \text{ N kg}^{-1}$ and on the Moon is $1.6 \text{N kg}^{-1}$.

What are the mass and weight of the object on the Moon?

	Mass (kg)	Weight (N)
A	15	24
B	15	150
C	24	15
D	150	24

B

A

D

C

3. A box X full of large granite rocks is weighed. An identical box Y full of small granite chippings is then weighed.

Which box weighs more and why?

Y ; There is less air in box Y

Y ; Density of a chipping is greater than a rock

X ; Density of a chipping is less than a rock

X ; There is more air in box X

4. A boy, who weighs 50 N, runs up a flight of stairs 6.5 m high in 7 seconds.

How much power does he develop?

$\frac{6.5}{50 \times 7}$ W

$\frac{50 \times 6.5}{7}$ W

$\frac{7 \times 6.5}{50}$ W

$\frac{50}{7 \times 6.5}$ W

5. Which of the following about energy is false?

Energy has to be supplied when a chair supports a man sitting on it

Energy has to be supplied when a man bends an iron bar

Energy has to be supplied when a boy swings his arms during exercise

Energy has to be supplied when a helicopter lifts a passenger off the ground

6. A machine is able to lift 200 kg of bricks vertically up to a height of 30 m above the ground in 50 s. What is the power of the machine? (Take the acceleration due to gravity, $g$, to be $10 \text{ ms}^{-2}$.)

300 kW

1.2 kW

6.0 kW

0.12 kW

7. Ali uses a 3 kW heater and a 100 W lamp together for a certain period of time. During this time, the lamp uses 0.5 kWh of energy. How much energy is used by the heater during this same period?

30 kWh

150 kWh

3 kWh

15 kWh

8. The mass of a paper-clip is 0.50 g and the density of its material is $8.0 \text{ g cm}^{-3}$. The total volume of a number of paper-clips is $20 \text{ cm}^{3}$.

How many paper-clips are there?

240

80

160

320

9. A bullet strikes a fixed target and is brought to rest. The main energy changes when this happens are:

kinetic to sound and internal energy

potential to sound and heat

kinetic to potential and sound

potential to sound and internal energy

10. Four students exercise in a gym.

Which student does the most work?

	Exercise Time (s)	Power Developed (W)
A	50	250
B	100	150
C	200	200
D	250	30

D

B

A

C

 Loading...

 

Back To O Level Physics

Back To List of O Level Physics Quiz