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Physics Past Questions

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108 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

108 questions
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Question 1 of 8 108 total questions
Question 51
jamb 1991
A 20kg mass is to be pulled up a slope inclined at 30o to the horizontal. If the efficiency of the plane is 75%, the force required to pull the load up the plane is [g = 10ms-2]
A13.3N
B73.5N
C133.3N
D53.2N
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Question 52
jamb 1991
A wheel and axle have radii 80cm and 10cm respectively. If the efficiency of the machine is 0.85, an applied force of 1200N to the wheel will raise a load of
A8.0N
B6.8N
C8160N
D9600N
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Question 53
jamb 1991
A spring of force constant 1500Nm-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string
A1.9J
B2.8J
C3.45J
D0.43J
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Question 54
jamb 1991

A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum.

A0.8Ns
B1.2Ns
C12.0Ns
D80.0Ns
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Question 55
jamb 1991

An object moves with uniform speed round a circle. Its acceleration has

Aconstant magnitude and constant direction
Bconstant magnitude and varying direction
Cvarying magnitude but constant direction
Dvarying magnitude and varying direction
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Question 56
jamb 1991

A small metal ball thrown vertically upwards from the top of a tower with an initial velocity of 20ms-1. If the ball took a total of 6s to reach ground level, determine the height of the tower [g = 10ms-2]

A60m
B80m
C100m
D120m
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Question 57
jamb 1991
A body of weight W N rest on a smooth plane inclined at an angle\(\theta\)o to the horizontal. What is the resolved part of the weight in Newtons along the plane?
AW sin\(\theta\)
BW cos\(\theta\)
CW sec\(\theta\)
DW tan\(\theta\)
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Question 58
jamb 1991
Which of the following is the most suitable for use as an altimeter?
AA mecury barometer
BA fortin barometer
CA mecury manometer
DAn aneroid barometer
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