NSO Level 1- Science Olympiad (SOF) Class 8: Questions 826 - 831 of 1076

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Question number: 826

» Friction

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MCQ▾

Question

Find out the situations where friction is helpful to us in our day today life

Choices

Choice (4) Response

a.

While walking

b.

While running

c.

While applying breaks in vehicles

d.

All a. , b. and c. are correct

Question number: 827

» Friction

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MCQ▾

Question

A toy car released with the same initial speed will travel farthest on

Choices

Choice (4) Response

a.

Polished marble surface

b.

Muddy surface

c.

Cemented surface

d.

Brick surface

Question number: 828

» Friction

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MCQ▾

Question

If an object moves on a frictionless floor, the possibility would be

Choices

Choice (4) Response

a.

Its speed would increase as it moves on

b.

Its speed would decrease as it moves on

c.

It would stop after sometime

d.

It would never stop

Question number: 829

» Friction

Edit
MCQ▾

Question

Select the true statement from the following

Choices

Choice (4) Response

a.

Friction is less in less in rough surfaces

b.

Friction is helpful in many ways

c.

Friction is an undesirable force

d.

Both a. and b. are correct

Question number: 830

» Force and Pressure

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MCQ▾

Question

Opposite poles of magnets attract each other. The force experienced in this case is called

Choices

Choice (4) Response

a.

Electrostatic force

b.

Magnetic force

c.

Gravitation

d.

Muscular force

Question number: 831

» Friction

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MCQ▾

Question

Invention of wheels is considered as a turning point in the life of early man. This made his work easier. The first wheel was a smooth round log. This helped him to move heavy objects from one place to another instead of dragging them. The scientific fact behind this is

Choices

Choice (4) Response

a.

Sliding friction is less than rolling friction

b.

Rolling friction is less than sliding friction

c.

Sliding friction is equal to rolling friction

d.

None of the above

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