EASY
5th CBSE
IMPORTANT
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The density of sea-water is less than that of fresh water.

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Important Questions on Energy and Work

EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
The upward force exerted by a liquid is called buoyant force.
EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
An object that floats in water will sink in mercury.
EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
A crow-bar is an example of a first-class lever.
EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
An inclined plane makes work easier for us.
EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
It is easier to get a screw with a bigger pitch into a piece of wood than a screw with a smaller pitch.
MEDIUM
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
A windlass is a continuously moving lever.
EASY
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 3
An object with high density floats in water.
MEDIUM
5th CBSE
IMPORTANT
Frank PRIMARY SCIENCE.>Chapter 11 - Energy and Work>Let Us Solve>Q 4

In the following diagram name three points and the class of the levers. F stands for a fulcrum, E for effort and L for a load.

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