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Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s-1. Calculate the magnitude of the radial acceleration of the body
A
62.50ms-2
B
31.25ms-2
C
12.50ms-2
D
10.00ms-2
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\alpha = \omega^2\)r
= 5\(^2\) x 2.5 = 25 x 2.5 = 62.5ms\(^{-2}\)
Source: Myschool Past Questions Archive (Record #34635)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A moving car of mass 800 kg experiences a frictional force of 200N. If it accelerates 2 ms-2, calculate the magnitude of the force applied to the car
A
600N
B
1000N
C
1600N
D
1800N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
F = M + FF 800 x 2 = 200
= 1800N
Source: Myschool Past Questions Archive (Record #34638)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
which of the following statements about simple harmonic motion is correct? The
A
total mechanical energy is always conserved
B
linear acceleration is directed to any variable point
C
linear acceleration varies inversely with displacement
D
period of oscillation varies linearly as acceleration due to gravity
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
In SHM, the total mechanical energy (the sum of potential and kinetic energy) remains constant, provided no damping or external forces are acting on the system.
Source: Myschool Past Questions Archive (Record #34650)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A force acting on a body causes a change in the momentum of a body from 12 kg ms-1 to 16kg ms-1 in 0.25. Calculate the magnitude of the impulse
A
28.0Ns
B
20.0Ns
C
4.0Ns
D
0.8Ns
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Ft = I = MY - Mv
I = 16 - 12 = 4Ns
Source: Myschool Past Questions Archive (Record #34652)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Which of the following source of energy is renewable?
A
petroleum
B
charcoal
C
hydro
D
nuclear
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #34653)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A stone of mass 2.0kg is thrown vertically upward with a velocity of 20.0 ms-1, calculate the initial kinetic energy of the stone
A
200J
B
400J
C
800J
D
1600J
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
K.E = \(\frac{1}{2}Mv^2 = \frac{1}{2} \times 2 \times 20^2 = 400J\)
Source: Myschool Past Questions Archive (Record #34654)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Which of the following statements about the mouth piece of a telephone is correct? It converts sound energy into
A
acoustic energy
B
mechanival energy
C
electrical energy
D
heat energy
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #34655)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
The potential energy in an elastic string of force constant K which has been extended by X metres is expresses as
A
\(\frac{1}{2}k \Box ^2\)
B
\(k \Box ^2\)
C
\(\frac{1}{2}k \Box \)
D
\(k \Box \)
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #34656)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
The engine of a train produces a force of 3000N when moving at 30.ms-1. calculate the power of the engine
A
1.00 x 102W
B
3.00 x 104W
C
9.00 x 104W
D
3.00 x 105W
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
P = FV
= 3 x 103 x 30
= 9 x 104W
Source: Myschool Past Questions Archive (Record #34657)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
The velocity ratio of an inclined plane, inclines at an angle \(\theta\) to the horizontal can be expressed as
A
(sin \(\theta)^{-1}\)
B
\(\sin \theta\)
C
(cos \(\theta)^{-1}\)
D
\(\cos \theta\)
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #34658)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A block and tackle system has six pulleys. a force of 50N applied to it lifts a load of weight W. If the efficiency of the system is 40%, calculate W
A
300N
B
200N
C
140N
D
120N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
M.A = \(\frac{E \times V.R}{100} = \frac{40 \times 6}{100} = \frac{12}{5}\)
W = M.A x effort
= \(\frac{12}{5} \times 50 = 120N\)
Source: Myschool Past Questions Archive (Record #34659)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
The amount of energy required to change a kilogram of ice in water without a change in temperature is
A
heat capacity of ice
B
specific heat capacity
C
specific latent heat of vaporisation of ice
D
specific latent heat of fusion of ice
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #34663)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
A quantity of steam at 100oC condenses to water at the same temperature by releasing 6.9 x 104J of energy. Calculate the mass of the condensed steam. [specific latent heat of vaporization of eater = 2.3 x 106 J kg-1]
A
3.0 x 10-1 kg
B
3.0 x 10-2 kg
C
3.0 x 10-3 kg
D
3.0 x 10-4 kg
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
M = \(\frac{Q}{T} = \frac{6.9 \times 10^{4}}{2.3 \times 10^6} = 3 \times 10^{-2} kg\)
Source: Myschool Past Questions Archive (Record #34664)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
Solution
a note of frequency 2000Hz has a velocity of 400 ms-1. calculate the wavelength of the note
A
5.0m
B
2.0m
C
0.5m
D
0.2m
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(\pi = \frac{v}{f} = \frac{400}{2000} = 0.2m\)
Source: Myschool Past Questions Archive (Record #34667)
Physics
WAEC / WASSCE 2006
Mechanics and Properties of Matter
The acceleration due o gravity may be defined as the force
A
of attraction of the sun and on the earth
B
with which the earth revolves around the sun
C
with which the earth attracts one kilo-gram mass
D
of the moon on the earth
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #34688)