Question

Baterials for a strong grip.
that people won't slip while running or playing.
pushion (muscular force/friction)
3. The
2. Rolling friction is
than sliding friction. (greater/\esser)
between them. (irregularities/regularities)
4. Use of lubricants
the friction. (increases/decreases)
5. Streamlined shape of a car
drag due to air. (reduces/enhances)
Revise and recall
Fill in the blanks with the correct words.
1. The force that opposes the motion of a body over a surface is called
on the surfaces in contact is the cause of friction



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Answer 1

Write how the following metho-

-ds of preservation work.Also,

add two examples of food that can be preserved by each of

these methods:-

Method: •Pickling

•Ozone treatment

•Drying

•Adding preservatives

•Canning

•Vacuum packing

•Freezing

•Radiation

•Salting

How it works: •________

•_________

•_________

•_________

•_________

•_________

•_________

•__________

•__________

Examples (of food preserved)

: