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Physics Past Questions

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

146 questions
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Question 1 of 6 146 total questions
Question 71
jamb 2000

A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is

A4.0 x 102N
B2.0 x 103N
C4.0 x 103N
D4.0 x 104N
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Question 72
jamb 2000

If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is

Adoubled
Breduced to a quarter
Creduced by half
Dconstant
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Question 73
jamb 2000

At a fixed point below a liquid surface, the pressure downwards is P1 and pressure upwards is P2. It can be deduced that?

AP1 > P2
BP1 ≥ P2
CP1 < P2
DP1 = P2
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Question 74
jamb 2000

The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?

A20N
B30N
C40N
D50N
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Question 75
jamb 2000

I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centre

Which combination of the above is true of a body moving with constant speed in a circular track?

AII and IV
BI and IV
CII and III
DI and III
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Question 76
jamb 2000
When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will
Aincrease
Bdecrease
Cremain the same
Dincrease then decrease
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