Physics-Motion and Force (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 19 - 23 of 26

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Question number: 19

» Physics » Motion and Force

MCQ▾

Question

Consider the following statements

I. Grease is used to reduce friction in bicycle chain.

II. Ball bearings are used to reduce friction in a fan.

III. Oil can be used to increase friction in a car engine.

IV. Talc can be used to reduce friction when an object is sliding on a surface.

Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

I, II, and IV

b.

I, II, and III

c.

II, III, and IV

d.

I, III, and IV

Question number: 20

» Physics » Motion and Force

MCQ▾

Question

Protons and neutrons are bound in a nucleus by the

Choices

Choice (4) Response

a.

Long range ‘gravitational interaction’

b.

Short range ‘strong interaction’

c.

Short range ‘weak interaction’

d.

Long range ‘electromagnetic interaction’

Question number: 21

» Physics » Motion and Force

MCQ▾

Question

A truck and a car are moving with equal velocity. On applying the brakes both will stop after same distance, then

Choices

Choice (4) Response

a.

Time will not be same

b.

Time will be same

c.

Acceleration is not negative

d.

None of the above

Question number: 22

» Physics » Motion and Force

MCQ▾

Question

A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 s later. Both strike the water simultaneously. What was the initial speed of the second stone?

Choices

Choice (4) Response

a.

17.15 ms

b.

14.75 ms

c.

12.25 ms

d.

16.23 ms

Question number: 23

» Physics » Motion and Force

MCQ▾

Question

A particle is projected up with an initial velocity of 80 ft/s. The ball will attain height of 96 ft from the ground after

Choices

Choice (4) Response

a.

Only at 15.02 s

b.

After 1 and 2 s

c.

Only at 1.3 s

d.

1.3 and 15.02 s

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