Question # 1

Which of the following is a non conservative force.

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Gravitational force

Air resistance

Elastic force

Tension in a string

Unit vector of a vector A describes

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Magnitude of a given vector

Direction of given vector

Shape of a given vector

Magnitude and direction of a given vector

A man in an elevator descending with an acceleration will conclude that his weight has

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Increased

Decreased

Constant value

Zero value

If a force of 50 N is acting along x axis , then its component along y-axis will be.

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Zero

The same

Of the half magnitude

Of the double magnitude

If there are no frictional effects, the mechanical energy of a system executing simple harmonic motion.

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Changes with time

Is variable

Is constant

Is not conserved

The reverse process of vector addition is called

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Negative of a vector

Subtraction of vectors

Resolution of vectors

Multiplication of vector

Conventionally antilock wise torque is taken as.

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Zero

Positive

Infinity

Negative

If two bodes are under a collision that is not perfectly elastic then.

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K.E. is conserved but momentum is not

Momentum is conserved but K.E. is not

Neither K.E. nor momentum is conserved

Both K.E. and momentum are conserved

The SI unit of solid angle is

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Degree

Radian

Steradian

Candala

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PPSC Physics Chapter 1 MECHANICS MCQs With Answers

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