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2014 - WAEC Physics Past Questions and Answers - page 1

1

A ball falling through a viscous liquid is acted upon by

A
upthrust only
B
upthrust and the ball's weight
C
the ball's weight and viscous force
D
upthrust, the ball's weight and viscous force
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2

An object of mass m moves with a uniform speed v round a circular path of radius. If its angular speed is (\omega), the magnitude of the centripetal force acting on it is

A
mω2r
B
mv2r
C
mωr
D
mv2r2
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3

When an elastic material is stretched by a force, the energy stored in it is

A
kinetic
B
potential
C
thermal
D
electrical
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4

When the linear momentum of a body is constant, the net force acting on it

A
is zero
B
increases
C
decreases
D
remains constant
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5

If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton's

A
first law of motion
B
second law of motion
C
third law of motion
D
law of universal gravitation
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6

Which of the following pairs of physical quantities is made up of vectors?

A
speed and displacement
B
mass and force
C
dislacement and acceleration
D
momentum and length
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7

The knowledge of surface tension is applied in the following areas except in

A
manufacturing of rain coats
B
production of palm oil
C
floating of a needle on water
D
washing of plates with soapy water
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8

A body is projected vertically upwards with a speed of 10 ms-1 from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms-2]

A
1.00s
B
2.00s
C
2.18s
D
3.00s
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9

A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration

A
0.25ms-2
B
0.80ms-2
C
3.20ms-2
D
4.00ms-2
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10

The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M

A
500.0g
B
400.0g
C
44.4g
D
25.0g
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