NSO Level 1- Science Olympiad (SOF) Class 8: Questions 785 - 789 of 1175

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Question 785

Question

MCQ▾

When an object rolls over a surface, the friction created is called

Choices

Choice (4)Response

a.

Fluid friction

b.

Sliding friction

c.

Static friction

d.

Rolling friction

Question 786

Question

MCQ▾

Two boys were conducting a race with their toy cars, which are similar in all aspects. They started the race simultaneously with same speed. One has selected a sandy surface and the other has selected a polished marble floor. The car running on the marble surface won the race. How will you explain this incident?

Choices

Choice (4)Response

a.

Sandy surface applied more friction on the car

b.

Polished marble surface applied more friction on the car

c.

Polished marble and Sandy the surface applied same friction on the cars

d.

None of the above

Question 787

Question

MCQ▾

In the given figure, the effect of force is

Figure of the Effect of Force

Choices

Choice (4)Response

a.

Change shape

b.

Change direction

c.

Change speed

d.

Start motion

Question 788

Question

MCQ▾

If there is no friction, which of the following activities would be easier

Choices

Choice (4)Response

a.

Fixing a nail

b.

Lighting a match stick

c.

Moving a table

d.

Writing on a board

Question 789

Question

MCQ▾

It is easy to lift 240 kg heavy dumb bell on moon for a weight lifter who lifts a maximum weight of 120 kg on earth.

Choices

Choice (4)Response

a.

Gravity of moon and earth are same

b.

Gravity of earth is 6 times that of moon

c.

Gravity of moon is 6 times that of earth

d.

Gravity of earth is two times that of moon

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