Physics JAMB Past Questions And Answers Year 2000 Provided By Akahi Tutors

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Physics JAMB Past Questions And Answers Year 2000 Provided By Akahi Tutors

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1
When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will

A increase
B decrease
C remain the same
D increase then decrease
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2
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?

A II and IV
B I and IV
C II and III
D I and III
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3
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?

A 20N
B 30N
C 40N
D 50N
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4
At a fixed point below a liquid surface, the pressure downwards is P1and pressure upwards is P2. It can be deduced that

A P1 > P2
B P1 ≥ P2
C P1 < P2
D P1 = P2
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5
If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is

A doubled
B reduced to a quarter
C reduced by half
D constant

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