Physics - Questions and Answers, General Study (GK)

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61.

To avoid slipping while walking on ice, one should take smaller steps because of the

(a)friction of ice is large

(b)larger normal reaction

(c)friction of ice is small

(d)Smaller normal reaction

Comment

Answer is: CNA

62.

The function of ball bearing in a wheel is

(a)To increase friction

(b)To convert kinetic friction into rolling friction

(c)To convert static friction into kinetic friction

(d)Just for convenience

Comment

Answer is: BNA

63.

Angle of friction and angle of repose are

(a)equal to each other

(b)not equal to each other

(c)proportional to each other

(d)None of the above

Comment

Answer is: BNA

64.

Roadways are banked on curves so that

(a)The fractional force between the road and vehicle may be decreased

(b)The wear and tear tyre may be avoided

(c)The speeding vehicles may not fall inwards

(d)The weight of the vehicle may be decreased

Comment

Answer is: BNA

65.

If the radius of the earth was shrink by one percent, mass remaining the same, the value of 'g' on the earth's surface would

(a)increase by 0.5%

(b)Increase by 2%

(c)decrease by 0.5%

(d)decrease by 2%

Comment

Answer is: DNA

66.

The weight of the body at the center of the earth is

(a)inifinte

(b)zero

(c)Slightly less than at the equator

(d)Slightly more than that at the equator

Comment

Answer is: BNA

67.

Weightlessness experienced in spaceship is due to

(a)Absence of inertia

(b)Absence of accelerating force

(c)Absence of gravity

(d)free fall of the spaceship

Comment

Answer is: BNA

68.

Two satellite are moving in the same circular orbit around the earth, they must have the same

(a)mass

(b)angular momentum

(c)KE

(d)speed

Comment

Answer is: BNA

69.

As we go from the equator to the poles, the value of 'g'

(a)Remains the same

(b)Increases

(c)Decreases

(d)None of these

Comment

Answer is: CNA

70.

Who among the following gave first the experimental value of 'G'?

(a)Newton

(b)Cavendish

(c)Galileo

(d)None of the above

Comment

Answer is: BNA

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Physics - Questions and AnswersPage 7

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