Assertion (A): The upper surface of the wing of an aeroplane is made convex and the lower surface is made concave. Reason (R): The air currents at the top have smaller velocity and thus less pressure at the bottom than at the top.

Both A and R are true and R is a correct explanation for A

Both A and R are true but R is not a correct explanation for A

Water does not wet an oily glass because

Cohesive force of water is greater than adhesive force between water and oil molecules

Cohesive force of oil is greater than adhesive force between oil and glass

Cohesive force of oil is greater than cohesive force of water

EASY

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IMPORTANT

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What causes the free surface of a liquid to have minimum area?

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Important Questions on Mechanical Properties of Matter

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2020 (Sep-23 Shift-1)>Q 8

A wire of length

1 m

and radius

2 mm

is vertically clamped. The lower end is twisted through an angle of

45 °

. The angle of shear is _____

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET - 20 Aug 2021 Afternoon>Q 9

The dimensions of stress is

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2021 (19-Aug Forenoon)>Q 10

The lower end of a capillary tube is dipped into water and it is observed that the water in capillary tube rises by

7.5 cm

. Find the radius of the capillary tube used, if surface tension of water is

7.5 \times 10^{- 2} N m^{- 1}

? Angle of contact between water and glass is

0 °

and acceleration due to gravity is

10 m s^{- 2}

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2019 (21-Apr Shift-2)>Q 11

Two capillary tubes of same length each of

50 cm

but of different radii

4 mm

and

2 mm

are connected in series. When water flows, the pressure difference between the ends of the arrangement is

P

. Then the pressure difference between the ends of the first tube is

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2021 (19-Aug Afternoon)>Q 12

Identify the incorrect statement regarding Reynold's number

(R_{e}) :

MEDIUM

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2020 (Sep-23 Shift-1)>Q 13

What is the pressure required to reduce the given volume of water by

1 %

? (Bulk modulus

(K) = 2 \times 10^{8} N m^{- 2}

)

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2018 (25-APR Shift-1)>Q 14

A rubber cube of side

5 cm

has one face fixed while a tangential force

1800 N

is applied on its opposite face. If modulus of rigidity of rubber is

2.4 \times 10^{6} N m^{- 2}

, then the lateral displacement of the strained face is______.

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 18 - Mechanical Properties of Matter>AP EAPCET 2021 (19-Aug Forenoon)>Q 15

The Young's modulus of a rubber string of length

12 cm

and density

1.5 kg m^{- 3}

5 \times 10^{8} N m^{- 2}

. When this string is suspended vertically, the increase in its length due to its own weight is (take

g = 10 m s^{- 2}

)

What causes the free surface of a liquid to have minimum area?

Important Questions on Mechanical Properties of Matter

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