A 15kg mass, suspended from a ceiling, is pulled aside with a horizontal force, F, as shown in the diagram above. Calculate the value of the tension, T. (g = 10ms-2)
A300.0N
B173.2N
C30.0N
D17.3N
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Question 22
waec1999
If the force of attraction between the sun and the 1 planets is removed; the planets will
Afall towards the sun
Bscatter and stop moving
Ccontinue to move at tangent to their original orbits
Dcontinue to move perpendicular to their original orbits. '
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Question 23
waec1999
A stone of mass 0.7kg is projected vertically , upwards with a speed of 5ms-1. Calculate the maximum height reached. (Take g as 10ms-2 and neglect air resistance)
A1.00m
B1.25m
C1.50m
D3.75m
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Question 24
waec1999
The time rate of change of displacement is known as
Aspeed
Bvelocity
Cimpulse
Dacceleration
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Question 25
waec1999
A motorcyclist, passing a road junction, moves due west for 8 s at a uniform speed of 5ms-1. He then moves due north for another 6 s with the same speed. At the end of the 6s his displacement from the road junction is 50m in the direction of
AN53oE
BN37oE
CN53oW
DN37oW
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Question 26
waec1999
A body weighing 100N moves with a speed of 5ms-1 in a horizontal circular path of radius 5m. Calculate the . magnitude of the centripetal force acting on the body. (g = 10ms-2)
A10N
B50N
C75N
D100N
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Question 27
waec1999
Palm oil from a bottle flows out more easily after it as been heated because the
Amolecules are given potential energy during the heating
Bfriction between oil layers is reduced
Coil molecules force each other out
Dadhesion between the oil molecules and those of the bottle is increased
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Question 28
waec1999
A net force of magnitude 0.6N acts on a body of mass 40g, initially at rest. Calculate the magnitude of tire resulting acceleration.
A90ms-2
B60ms-2
C30ms-2
D15ms-2.
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Question 29
waec1999
The force between molecules of the same substance is termed
Aelastic force
Brepulsive force
Ccohesive force
Dadhesive force
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Question 30
jamb1999
In the series a.c circuit shown above, the p.d across the inductor is 8Vr.m.s and that across the resistor is 6Vr.m.s. The effective voltage is
A2V
B10V
C14V
D48V
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Question 31
jamb1999
In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P1 and P2 dissipated by R1 and R2
AR2/R1
BR1/R2
CR1+R2/R1
DR1+R2/R2
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Question 32
jamb1999
In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is
A3.0 x 104J
B3.0 x 102J
C2.5 x 10-2J
D6.0 x 10-3J
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Question 33
jamb1999
In the circuit above, the ammeter reads a current of 5.0 A when R = 8Ω and reads 7.0A when R = 5Ω. The value of the unknown resistance X is
A10.0Ω
B7.5Ω
C5.0Ω
D2.5Ω
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Question 34
jamb1999
The diagram above shows a magnet X with its south pole moved along a soft - iron bar PQ in the direction shown. After some time, the poles at P and Q respectively are
ANorth - North
BNorth - South
CSouth - North
DSouth - South
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Question 35
jamb1999
The diagram above shows the prism arrangement in a
Abinocular
Bspectrometer
Cperiscope
Dprojector
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Question 36
jamb1999
The diagram above represents a transverse electromagnetic wave travelling with speed 3.0 x 108ms-1. What is the frequency of the wave.
A3.0 x 107Hz
B9.0 x 107Hz
C1.0 x 109Hz
D3.0 x 109Hz
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Question 37
jamb1999
In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X
A15 cm3
B25 cm3
C35 cm3
D45 cm3
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Question 38
jamb1999
The diagram above shows a lift pump with valves at P and Q. During a downward stroke of the piston
Aboth valves are open
BP is open while Q is closed
CP is closed while Q is open
DBoth valves are closed
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Question 39
jamb1999
The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct
AThe solid will fall over if the vertical line through G lies outside the base
BThe solid will fall over if the vertical line through lies inside the base
CThe solid will not fall over if the vertical line through G lies outside the base
DThe solid can never fall over
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Question 40
jamb1999
The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W
