MEDIUM
5th CBSE
IMPORTANT
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How does a screw jack work? 

Important Questions on Simple Machines

MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Exercises>Q 10
A single fixed pulley does not increase or decrease the force. How then is it useful as a simple machine?
MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Exercises>Q 11
Draw an illustration of a lever that reduces force. Mark the position of the load, fulcrum, and effort on it.
MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Think And Answer>Q 1
With the help of a screw jack, even a small child can raise a heavy car. What makes this possible?
MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Think And Answer>Q 2
Archimedes, the ancient Greek inventor, once said, “Give me a lever long enough, and I can move the earth.” Do you think this can be done?
MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Think And Answer>Q 3
A wheel is not a simple machine because, in itself, it cannot decrease or increase force or change its direction. What is done to make it into a simple machine?
MEDIUM
5th CBSE
IMPORTANT
AWARENESS SCIENCE Book 5>Chapter 10 - Simple Machines>Project 1>Q 1

Archimedes used the principle of the screw to make the machine. Draw water from a river. Find out the name given to the machine.

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