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Physics WAEC / WASSCE 2001 Equilibrium of Forces, Moments & Flotation
An object weight 10N immersed in a liquid displaces a quantity of the liquid. If the liquid displaced weighs 6N, determine the upthrust of the object
A
20N
B
10N
C
6N
D
4N
medium Difficulty
Physics WAEC / WASSCE 2001 Current Electricity & Electric Circuits
Which of the following statements about pressure is not correct? pressure
A
increases with an increase in surface area
B
decreases with an increase in surface area
C
increases with a decrease in surface area
D
increases with an increase in the applied force
medium Difficulty
Physics WAEC / WASSCE 2001 Equilibrium of Forces, Moments & Flotation
The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm-3, g = 10ms-2]
A
8.9 x 10-3m3
B
6.4 x 10-3m3
C
3.2 x 10-3m3
D
3.0 x 10-3m3
medium Difficulty
Physics WAEC / WASSCE 2001 Current Electricity & Electric Circuits
A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the friction force on the block
A
0.3N
B
0.5N
C
3.0N
D
5.0N
medium Difficulty
Physics WAEC / WASSCE 2001 Linear Motion, Projectiles & Kinematics
Which of the following equations represents the distance x, travelled by a body moving on a straight road with a constant speed? [The other symbol have their usual meanings]
A
x = Ut + \(\frac{1}{2}t^2\)
B
x = Ut
C
x = \(\frac{V^2 - U^2}{2a}\)
D
x = -\(\frac{1}{2} at^2\)
medium Difficulty
Physics WAEC / WASSCE 2001 Waves, Sound & Vibrations
The amplitude of the motion of a body performing simple harmonic motion decreases with time because
A
friction force dissipate the energy of motion
B
the frequency of oscillation varies with time
C
the period of oscillation varies with time
D
energy is supplied by some external agency
medium Difficulty
Physics WAEC / WASSCE 2001 Circular Motion, Gravitation & Simple Harmonic Motion
The amplitude of a particle executing simple harmonic motion in 5cm while its angular frequency is 10 rad s-1. calculate the magnitude of the maximum acceleration of the particle
A
0.25ms-2
B
0.50ms-2
C
2.00ms-2
D
5.00ms-2
medium Difficulty
Physics WAEC / WASSCE 2001 Newton's Laws, Momentum & Collisions
The time rate of change of momentum is
A
impulse
B
force
C
power
D
pressure
medium Difficulty
Physics WAEC / WASSCE 2001 Work, Energy, Power & Simple Machines
Which of the following statements about elastic collision is correct?
A
momentum is lost due to the sound produced
B
loss of momentim is equal to loss in kinetic energy
C
both kinetic energy and momentum are conserved
D
kinetic energy is lost while momentum is conserved
medium Difficulty
Physics WAEC / WASSCE 2001 Current Electricity & Electric Circuits
Electrical resistance is a property of an electrical energy to be converted into
A
mechanical energy
B
heat energy
C
magnetic energy
D
chemical energy
medium Difficulty
Physics WAEC / WASSCE 2001 Work, Energy, Power & Simple Machines
A simple machine with an efficiency of 75% lifts a load of 5000N when a force of 500N is applied to it. Calculate the velocity ratio of the machine
A
10.0
B
13.3
C
17.5
D
25.0
medium Difficulty
Physics WAEC / WASSCE 2001 Work, Energy, Power & Simple Machines
A screw jack with a Tommy bar of length 12cm is used to raise a car through a vertical height of 25cm by turning the Tommy bar through 50 revolutions. Calculate the approximate velocity ratio of the jack [\(\pi = 3.142\)]
A
21
B
38
C
48
D
151
medium Difficulty
Physics WAEC / WASSCE 2001 Equilibrium of Forces, Moments & Flotation
a beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]
Attached Figure / Diagram
Question diagram
A
32.0N
B
26.7N
C
16.0N
D
13.3N
medium Difficulty
Physics WAEC / WASSCE 2001 Temperature, Thermometry & Thermal Expansion
A resistance thermometer has a resistance of 20\(\Omega\) at 0oC and 85\(\Omega\) at 100oC. If its resistance is 52\(\Omega\)in a medium, calculate the corresponding temperature
A
49.2oC
B
60.6oC
C
80.0oC
D
84.7oC
medium Difficulty
Physics WAEC / WASSCE 2001 Gas Laws & Heat Transfer
A given mass of an ideal gas has a pressure of 500Nm-2 at -13ºC. If its volume remains constant. Calculate its pressure at 247ºC.
A
25Nm-2
B
50Nm-2
C
500Nm-2
D
1000Nm-2
medium Difficulty
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