# 2000 - WAEC Physics Past Questions and Answers - page 1

1
The diagram above illustrates three forces T1, T2 and 100N in equilibrium. Determine the magnitude of T1
A
100 tan 30o
B
$$\frac{100}{\cos 30^o}$$
C
200 sin 301
D
$$\frac{200}{tan 30^o}$$
correct option: a
2
An iron rod is moved from the earth to the moon. Which of the following properties of the rod would remain unchanged? i. mass ii. weight iii. relative density
A
i only
B
ii only
C
iii only
D
i and iii only
correct option: d
3
A uniform cylindrical hydrometer of mass 20g and cross sectional area 0.54cm2 floats upright in a liquid. If 25cm of its length is submerged, calculate the relative density of the liquid. (Density of water = 1 gcm-3)
A
1.54
B
1.48
C
1.25
D
0.80
correct option: b
4
The apparent weight of a body wholly 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-3)
A
8.9 x 10m-3m3
B
6.4 x 10m-3m3
C
3.2 x 10m-3m3
D
3.0 x 10m-3m3
correct option: b
5
A wooden block of mass 1.6kg rest on a rough horizontal surface, if the limiting friction force between the block and the surface is 8N. Calculate the coefficient of friction. (g = 10ms-2)
A
0.6
B
0.5
C
0.3
D
0.2
correct option: b
6
A ball bearing is gently released from rest and allowed to fall through a viscous fluid. Which of the following statements about the motion is correct?
A
its acceleration decreases before terminal velocity is attained
B
when terminal velocity is attained the acceleration of the fluid becomes zero
C
its velocity increases before terminal velocity is attained
D
there is no resultant force on the ball before it attains terminal velocity
correct option: b
7
The driver of a car moving with uniform speed of 40ms-1 observes a truck approaching from the opposite direction with a speed of 20ms-1. Calculate the speed of the car relative to that of the truck
A
.5ms-1
B
2.0ms-1
C
20.0ms-1
D
60.0ms-1
correct option: d
8
A bus travelling at 15ms-1 accelerates uniformly at 4ms-2, what is the distance covered in 10s?
A
150m
B
170m
C
350m
D
600m
correct option: c
9
A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m
A
72g
B
102g
C
298g
D
504g
correct option: b