Power and Machines - JSS2 Basic technology Past Questions and Answers - page 1
1
What is power?
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A
The ability to do work
B
The rate at which work is done
C
The total energy in a system
D
The force applied over a distance
2
What is the SI unit of power?
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A
Joule
B
Newton
C
Watt
D
Horsepower
3
One Watt is equivalent to:
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A
One Joule per second
B
One Newton per metre
C
One Joule per metre
D
One Newton per second
4
Which of the following is NOT a type of simple machine?
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A
Lever
B
Pulley
C
Motor
D
Inclined plane
5
A lever amplifies force by:
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A
Increasing the distance over which the force is applied
B
Decreasing the amount of force required
C
Changing the direction of the applied force
D
All of the above
6
An inclined plane helps to:
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A
Increase the speed of an object
B
Reduce the amount of force needito lift an object
C
Changing the direction of the force
D
Convert energy from one form to another
7
wheel and axle is used to:
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A
Multiply force
B
Divide force
C
Change the direction of force
D
Increase speed without effort
8
Which simple machine consists of a wheel with a groove for a rope or cable?
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A
Inclined plane
B
Screw
C
Pulley
D
Wedges
9
A screw is essentially a(n):
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A
Inclined plane wrapped around a cylinder
B
Lever with a fulcrum
C
Wheel and axle with a groove
D
Wedge combined with a pulley
10
Which of the following is a complex machine?
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A
Lever
B
Bicycle
C
Pulley
D
Inclined plane
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