If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is
A2.2.5 x 10 5js-1
B2.5 x 104js-1
C3.3 x 103js-1
D3.3 x 102js-1
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Question 42
jamb2013
An object is moving with a velocity of 5m-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?
A25.0m
B20.0m
C1.3m
D1.0m
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Question 43
jamb2013
A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?
[Density of the cork = 0.25 x 103kgm-3, Density of the liquid = 1.25 x 103kgm-3]
A0.8
B0.5
C0.2
D0.1
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Question 44
jamb2013
Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms-2.
[g = 10ms-2]
A686N
B595N
C581N
D105N
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Question 45
jamb2013
A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2m-2. The time required to bring the train to a complete halt is?
A5s
B10s
C20s
D40s
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Question 46
jamb2013
A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?
A8s
B4s
C2\(\sqrt{2}s\)
D\(\sqrt{2}s\)
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Question 47
jamb2013
The pair of physical quantities that are scalar only are ?
Avolume and area
Bmoment and momentum
Clength and displacement
DImpulse and time
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Question 48
jamb2013
The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle 0f 30o with the resultant, find its magnitude.
A100.0N
B57.7N
C43.3N
D25.0N
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Question 49
jamb2013
When a brick is taken from the earth's surface to the moon, its mass
