# 2013 SEC 3 Physics Quiz (For Term 1)

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| By Sstsci
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Sstsci
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Quizzes Created: 8 | Total Attempts: 2,269
Questions: 25 | Attempts: 192

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This is a combined pre-test comprising of the physics topics to be taught in 2013 Term 1.
All SST Sec 3 students taking Physics are required to take this quiz.
The quiz will be available for your attempt starting this Fri 25 Jan and will close on 2359 hr this Sun 27 Jan 2013.

• 1.
• A.

1

• B.

2

• C.

3

• D.

4

• E.

5

• F.

6

B. 2
• 2.
• A.

1

• B.

2

• C.

3

• D.

4

• E.

5

• F.

6

D. 4
• 3.
• A.

10.0 km

• B.

12.5 km

• C.

15.0 km

• D.

17.5 km

C. 15.0 km
• 4.
• A.

1

• B.

2

• C.

3

A. 1
• 5.
• A.

1

• B.

2

• C.

3

C. 3
• 6.
• A.

OP

• B.

OQ

• C.

OR

• D.

OS

A. OP
• 7.
• A.

A

• B.

B

• C.

C

• D.

D

B. B
• 8.

### A constant horizontal force is applied to a body initially at rest on a smooth horizontal table. Which of the following quantities will not change during the application of the force?

• A.

The displacement of the body.

• B.

The velocity of the body.

• C.

The acceleration of the body.

• D.

The kinetic energy of the body.

C. The acceleration of the body.
Explanation
The acceleration of the body will not change during the application of the force. This is because acceleration is directly proportional to the force applied to an object, according to Newton's second law of motion. As long as the force remains constant, the acceleration will also remain constant. The displacement, velocity, and kinetic energy of the body, on the other hand, will change as the force is applied.

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• 9.
• A.

A

• B.

B

• C.

C

• D.

D

A. A
• 10.
• A.

A

• B.

B

• C.

C

• D.

D

D. D
• 11.
• A.

1

• B.

2

• C.

3

A. 1
• 12.
• A.

2 N

• B.

10 N

• C.

12 N

• D.

20 N

• E.

22 N

B. 10 N
• 13.
• A.

2 N

• B.

10 N

• C.

12 N

• D.

20 N

• E.

22 N

B. 10 N
• 14.

### The normal force acting on a body is always equal (in magnitude) to its weight.

• A.

True

• B.

False

B. False
Explanation
The normal force acting on a body is not always equal to its weight. The normal force is the force exerted by a surface to support the weight of an object resting on it. It is always equal in magnitude but opposite in direction to the force exerted by the object on the surface. The weight of an object, on the other hand, is the force exerted by gravity on the object and is equal to the mass of the object multiplied by the acceleration due to gravity. Therefore, the normal force and weight can be equal only when the object is in equilibrium and on a horizontal surface.

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• 15.

### An astronaut on the Moon can jump much higher than a person on Earth because

• A.

He/she weighs less on the Moon than on Earth.

• B.

His/her mass is less on the Moon than on Earth.

• C.

There is little or no atmosphere on the Moon.

A. He/she weighs less on the Moon than on Earth.
Explanation
The correct answer is that an astronaut on the Moon can jump much higher than a person on Earth because he/she weighs less on the Moon than on Earth. This is due to the difference in gravitational pull between the Moon and Earth. The Moon has only about 1/6th the gravity of Earth, so objects and people on the Moon weigh much less compared to their weight on Earth. As a result, the astronaut's reduced weight allows for a higher jump on the Moon.

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• 16.
• A.

1

• B.

2

• C.

3

C. 3
• 17.
• A.

A

• B.

B

• C.

C

• D.

D

C. C
• 18.
• A.

A

• B.

B

• C.

C

• D.

D

D. D
• 19.
• A.

A

• B.

B

• C.

C

• D.

D

A. A
• 20.
• A.

50 N

• B.

100 N

• C.

150 N

• D.

200 N

C. 150 N
• 21.
• A.

A

• B.

B

• C.

C

• D.

D

B. B
• 22.
• A.

2 Nm

• B.

6 Nm

• C.

10 Nm

• D.

22 Nm

D. 22 Nm
• 23.

### What does each division on the vernier scale of a vernier calipers represent?

• A.

0.01 mm

• B.

0.1 mm

• C.

0.1 cm

• D.

1 cm

B. 0.1 mm
Explanation
Each division on the vernier scale of a vernier calipers represents a measurement of 0.1 mm. This means that each small division on the scale corresponds to a difference of 0.1 mm in the measurement being taken. The vernier scale is used to provide a more precise measurement than what can be obtained from the main scale alone, allowing for measurements to be taken to the nearest 0.1 mm.

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• 24.

### What does each division on the thimble scale of a micrometer screw gauge represent?

• A.

0.001 mm

• B.

0.01 mm

• C.

0.01 cm

• D.

0.1 cm

B. 0.01 mm
Explanation
Each division on the thimble scale of a micrometer screw gauge represents a measurement of 0.01 mm.

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• Current Version
• Mar 18, 2023
Quiz Edited by
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• Jan 15, 2013
Quiz Created by
Sstsci

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