Question

fill these ex fast in science​

Answer 1

Answer:

1) MOTION

2) LESS

3) LESS

4) TO REDUCE

5) ROLLING

Answer 2

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(A)

1] Force of friction is a Contact Force (a)

2] Providing wheels on a moving body Reduces the Friction (b)

3] In Running Machine (a)

4] Friction can be increased by making the surface Rough (d)

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(B)

1] Once you kick on a ball , it rolls on for ever . ( False )

2] Heat energy is generated during Friction ( True )

3] Streamlined shape of a body increases moving friction ( False )

4] Lubrication is one way to reduce friction ( True )

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(C)

1] Friction always opposes the relative motion of a body .

2] Smooth surface produces Less friction than a rough surface.

3] Friction on set ice is less than the friction on land.

4] Use of fine powder on carrom board is to Reduce Friction.

5] Friction offered by rollers is called Rolling friction.

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(D)

1] Friction → opposes the motion

2] sliding friction → slides

3] rolling friction → rolls

4] streamlined body → ships and aeroplanes