Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 81 - 85 of 285

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Question number: 81

Physics
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Question

MCQ▾

If a particle moving with circular path and after moving whole cycle it reached at the same point at where it started. Then which of the following quantity is zero?

Choices

Choice (4)Response

a.

Speed

b.

Acceleration

c.

Displacement

d.

Distance

Question number: 82

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Question

MCQ▾

If a stone is thrown in vertically upward direction from a point and it reaches up to a maximum height at point and returns back; then which of the following relation is true?

( and are shown the kinetic energy at point and that at point . Similarly and are shown the potential energy at and that at point . )

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 83

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Question

MCQ▾

Calculate escape velocity from the planet having twice the radius and same mean density. The escape velocity from the earth is about .

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 84

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Question

MCQ▾

A truck from rest and rolls down a hill with a constant acceleration. It travels a distance of in . Find the force acting on it if its mass is metric tons:

(Hint: metric tone ).

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 85

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Question

MCQ▾

The change in linear momentum by the force is equal to:

Choices

Choice (4)Response

a.

Acceleration due to force

b.

Velocity due to force

c.

Impulse of force

d.

Question does not provide sufficient data or is vague