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2013 - JAMB Physics Past Questions and Answers - page 1

1

When a brick is taken from the earth's surface to the moon, its mass

A
remains constant
B
reduces
C
increases
D
becomes zero
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2

The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle 0f 30o with the resultant, find its magnitude.

A
100.0N
B
57.7N
C
43.3N
D
25.0N
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3

The pair of physical quantities that are scalar only are ?

A
volume and area
B
moment and momentum
C
length and displacement
D
Impulse and time
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4

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?

A
8s
B
4s
C
2\(\sqrt{2}s\)
D
\(\sqrt{2}s\)
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5

A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2m-2. The time required to bring the train to a complete halt is?

A
5s
B
10s
C
20s
D
40s
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6

Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms-2.

[g = 10ms-2]

A
686N
B
595N
C
581N
D
105N
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7

A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?

[Density of the cork = 0.25 x 103kgm-3, Density of the liquid = 1.25 x 103kgm-3]

A
0.8
B
0.5
C
0.2
D
0.1
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8

An object is moving with a velocity of 5m-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?

A
25.0m
B
20.0m
C
1.3m
D
1.0m
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9

If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is

A
2.2.5 x 10 5js-1
B
2.5 x 104js-1
C
3.3 x 103js-1
D
3.3 x 102js-1
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10

The coefficient of friction between two perfectly smooth surface is

A
infinity
B
one
C
half
D
zero
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