Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 212 - 219 of 285

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Question 212

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Question

MCQ▾

If a particle is taken to a height above the earth’s surface, where is equal to the radius of the earth. The acceleration due to gravity there is:

Choices

Choice (4)Response

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b.

c.

d.

Question 213

Physics
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MCQ▾

The bob of a pendulum moves from the mean position to an extreme position in . Then the time period of the pendulum is:

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Choice (4)Response

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b.

c.

d.

Passage

A object traveling with velocity collides head on with a object initially at rest. The collision is inelastic and after the collision both object are stuck together.

Question 214 (1 of 2 Based on Passage)

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MCQ▾

Velocity of the combination after the collision is:

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Choice (4)Response

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b.

c.

d.

Question 215 (2 of 2 Based on Passage)

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MCQ▾

The fraction of the kinetic energy lost during the collision is:

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Choice (4)Response

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d.

Question 216

Physics
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MCQ▾

If a body vibrating times in a minute and speed of the sound through this vibrating body in air is , then wavelength of the sound is approximately:

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Choice (4)Response

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Question 217

Physics
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MCQ▾

If a wave of frequency travels in the air with speed of , then the wavelength of the wave is:

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Choice (4)Response

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d.

Question 218

Physics
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Question

MCQ▾

The time period of a pendulum whose length is is:

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Choice (4)Response

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b.

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d.

Question 219

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Question

MCQ▾

The kinetic energy of Object is same as Object 2. But mass of object 1 is more than that of object 2. If and are the momentum of the object 1 and object 2 respectively, then which of the following is true?

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Choice (4)Response

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b.

c.

d.

None of the above