Physics - Questions and Answers, General Study (GK)

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31.

An object with a constant speed

(a)is always accelerated

(b)is not accelerated

(c)might be accelerated

(d)also has a constant velocity

Comment

Answer is: CNA

32.

When body is accelerated

(a)its speed always changes

(b)its velocity never changes

(c)its direction always changes

(d)its speed may or may not change

Comment

Answer is: DNA

33.

A body moves with a constant speed along a curved path, its acceleration

(a)is zero

(b)is parallel to its velocity

(c)can make any arbitrary angle with its velocity

(d)is perpendicular to its velocity

Comment

Answer is: CNA

34.

A man in a train moving with constant velocity drops a ball on the platform. The path of the ball as seen by an observer standing on the platform is

(a)a straight line

(b)a circle

(c)a parabola

(d)none of above

Comment

Answer is: CNA

35.

Water flows out of the hole of a bucket and follows a parabolic path. If the bucket falls freely under gravity, the water flow(ignoring air resistance)

(a)follows a straight line path relative to the falling bucket

(b)follows a parabolic path relative to the falling bucket

(c)stops

(d)decreases but continues to flow

Comment

Answer is: BNA

36.

Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?

(a)The heavier mass will reach greater height

(b)The lighter mass will reach greater height

(c)Both will reach the same height

(d)Any of them may reach greater height

Comment

Answer is: CNA

37.

The equation v² = u² + 2as, where the symbols have their usual meanings, follows from

(a)Newton first law

(b)Newton second law

(c)Newton third law

(d)None of the above

Comment

Answer is: DNA

38.

Which of the following statements is false?

(a)A body can have zero velocity and still be accelerated

(b)A body can have a constant velocity and still have a varying speed

(c)A body can have constant speed and still have varying velocity

(d)The direction of the velocity of a body can change when its acceleration is constant

Comment

Answer is: BNA

39.

Newton's second law gives the measure of

(a)acceleration

(b)force

(c)momentum

(d)angular momentum

Comment

Answer is: BNA

40.

The momentum of a system is conserved

(a)Always

(b)Never

(c)In the absence of an external force on the system

(d)None of the above

Comment

Answer is: CNA

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Physics - Questions and AnswersPage 4

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