NSO Level 1- Science Olympiad (SOF) Class 8: Questions 756 - 761 of 1175

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Question 756

Question

MCQ▾

When an aeroplane moves forward, the force acting on it to reduce the speed is

Choices

Choice (4)Response

a.

Friction of air

b.

Gravity

c.

Atmospheric pressure

d.

All a., b. and c. are correct

Question 757

Question

MCQ▾

When Riya slipped while walking through the passage, her teacher advised her to change her worn out shoe. The reason is

Choices

Choice (4)Response

a.

Smooth surface experiences less friction

b.

She slipped because of less friction

c.

The soul of a worn out shoe is smooth

d.

All a., b. and c. are correct

Question 758

Question

MCQ▾

Walking on a wet floor is risky.

Choices

Choice (4)Response

a.

Water reduces the friction of the floor

b.

There are chances of slipping

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question 759

Question

MCQ▾

Generally, liquids are used as lubricants but this is a solid lubricant.

Choices

Choice (4)Response

a.

Sand

b.

Salt

c.

Graphite

d.

Chalk powder

Question 760

Question

MCQ▾

The force opposing that decreases the speed of the boy in the given figure is

Image Shown Friction

Choices

Choice (4)Response

a.

Gravity

b.

Friction

c.

Muscular force

d.

All of the above

Question 761

Question

MCQ▾

In the given figure, the effect of force is

Figure Shown the Effect of Force Figure 1
Figure Shown the Effect of Force Figure 2

Choices

Choice (4)Response

a.

Start motion

b.

Change direction

c.

Change speed

d.

Change shape

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