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TS EAMCET

IMPORTANT

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Consider a small block sliding down an inclined plane of inclination $30 °$ with the horizontal. The coefficient of friction is $μ = \frac{2}{3} x,$ where $x$ is the distance (in meter) through which the mass slides down. The distance covered by the mass before it stops is

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Important Questions on Work, Energy and Power

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET - 5 August 2021 Shift 1>Q 7

A small block of mass

200 g

is placed on a horizontal slab at a height of

2 m

above the floor. The block is pressed against a horizontal spring fixed at one end to compress the spring through

10.0 cm .

Upon releasing, the block moves horizontally till it leaves the spring. Calculate the horizontal distance covered by the block after leaving the slab and just before hitting the ground. The spring constant is

50 N m^{- 1} .

(Assume

g = 10 m s^{- 2}

EASY

TS EAMCET

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET 2020 (9-Sep Shift-1)>Q 8

A block of mass

100 g

moving at a speed of

2 m s^{- 1}

compresses a spring through a distance

2 cm

before its speed is halved. Find the spring constant of the spring

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET 2019 (03-May Shift-2)>Q 9

A mass of

2 kg

, initially at a height of

1.2 m

above an uncompressed spring with spring constant

2 \times 10^{4} N m^{- 1},

is released from rest to fall on the spring. Taking the acceleration due to gravity as

10 m s^{- 2}

and neglecting the air resistance, the compression of the spring in

mm

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET 2021 (04-Aug Shift-1)>Q 10

The potential energy of a particle in a central field has the form

U (r) = \frac{1}{r^{2}} - \frac{1}{r},

where

' r'

is the distance from the centre of the field. The magnitude of the maximum attractive force in Newton is

MEDIUM

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET - 5 August 2021 Shift 1>Q 11

Which of the following is not a correct statement?

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TS EAMCET

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET 2021 (04-Aug Shift-1)>Q 12

Water is pumped steadily out of a flooded basement, at the speed of

10 m s^{- 1}

through a hose (tube) of radius,

1 cm,

passing through a window,

3 m

above the water level. The power of the pump is (Assume

g = 10 m s^{- 2}

, density of water

= 1000 kg m^{- 3}

)

HARD

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET - 5 August 2021 Shift 1>Q 13

A constant force of

5 N

accelerates a stationary particle of mass

500 gm

through a displacement of

5 m .

The average power delivered is

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 6 - Work, Energy and Power>TS EAMCET - 5 August 2021 Shift 2>Q 14

A water pump rated

600 W,

has an efficiency of

95 % .

If it is used to raise water through vertical distance of

60 m .

The volume of water drawn in

20

minutes, is [Use density of water

= 1000 kg m^{- 3}, g = 10 m / s^{2}

]

Consider a small block sliding down an inclined plane of inclination 30° with the horizontal. The coefficient of friction is μ=23x, where x is the distance (in meter) through which the mass slides down. The distance covered by the mass before it stops is

Important Questions on Work, Energy and Power

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Consider a small block sliding down an inclined plane of inclination $30 °$ with the horizontal. The coefficient of friction is $μ = \frac{2}{3} x,$ where $x$ is the distance (in meter) through which the mass slides down. The distance covered by the mass before it stops is