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Physics Past Questions

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

89 questions
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Question 1 of 9 89 total questions
Question 41
jamb 2012

A block and tackle is used to raise a load of 250N through a vertical distance of 30m. What is the efficiency of the system if the work done against friction is 1500J?

A62.5%
B73.3%
C83.3%
D94.3%
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Question 42
jamb 2012
An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is?
[g = 10ms-2]
A0.2
B0.3
C0.5
D0.6
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Question 43
jamb 2012
An object moves in a circular path of radius 0.5m with a speed of 1ms-1 What is its angular velocity?
A8 rads-1
B4 rads-1
C2 rads-1
D1 rads-1
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Question 44
jamb 2012
If a freely suspended object is pulled to one side and released, it oscillates about the point of suspension because the
Aacceleration is directly proportional to the displacement
Bmotion is directed away from the equilibrium point
Cacceleration is directly proportional to the square of the displacement
Dvelocity is minimum at the equilibrium ponit
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Question 45
jamb 2012
A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal gravitation, the force F will
Aincrease as r reduces
Bincrease as G varies
Cremains constant
Dincreases as r increases
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Question 46
jamb 2012
A car starts from rest and moves with a uniform acceleration of 30ms-2 for 20s. Calculate the distance covered at the end of the motion
A6km
B12km
C18km
D24km
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Question 47
jamb 2012
Calculate the total distance covered by a train before coming to rest if its initial speed is 30ms-1 with a constant retardation of 0.1m-2
A5500m
B4500m
C4200m
D3000m
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Question 48
jamb 2012
A load is pulled at a uniform speed along a horizontal floor by a rope at 45o to floor. If the force in the rope is 1500N, what is the frictional force on the load ?
A1524N
B1350N
C1260N
D1061N
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Question 49
jamb 2012

In order to remove the error of parallax when taking measurements with a metre rule, the eye should be focused

Aslantingly towards the right on the markings
Bslantingly towards the left on the markings
Cvertically downwards on the markings
Dvertically upwards on the markings
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