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