Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 237 - 241 of 285

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Question 237

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Question

MCQ▾

If two forces of and act on a body in opposite direction in a straight line as shown in figure, then the resultant force is:

Two forces applied on a body

Two Forces Applied on a Body

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Choices

Choice (4)Response

a.

in the direction from to

b.

in the direction from to

c.

in the direction from to

d.

in the direction from to

Question 238

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Question

MCQ▾

The SI unit of the universal constant of gravitation is:

Choices

Choice (4)Response

a.

b.

c.

d.

Question 239

Physics
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Question

MCQ▾

The speed of a sound wave in air is at temperature of air and speed of same sound wave in air is at temperature of air . If the temperature is more than temperature , then which of the following is correct?

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 240

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Question

MCQ▾

If the mass of a heavenly body is half of that of the earth and a radius is twice of that of the earth, then the weight of a block on this heavenly body, which weight on the earth is will be:

Choices

Choice (4)Response

a.

b.

c.

d.

Question 241

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Question

MCQ▾

Three blocks and of masses and respectively are connected by a light inextensible string and they are moved on a smooth horizontal plane. If a force of is applied to the string connected to

Three blocks connected by a light inextensible string

Three Blocks Connected by a Light Inextensible String

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The ratio of and , the tensions in the string is:

Choices

Choice (4)Response

a.

b.

c.

d.