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Brinda
Brinda
Asked: December 14, 2020In: Class 9 Science

What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is 6 × 10²⁴ kg and radius of the earth is 6.4 × 10⁶ m).

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-143 Questions No-2

2020-2021cbsechapter 10class 9 scienceclass9gravitationncertscience
  • 2 2 Answers
  • 287 Views
  • 7 Votes
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Brinda
Brinda
Asked: December 14, 2020In: Class 9 Science

A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-128 Questions No-7

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 1 1 Answer
  • 1k Views
  • 8 Votes
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Brinda
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Brinda
Asked: December 14, 2020In: Class 9 Science

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-128 Questions No-4

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 2 2 Answers
  • 432 Views
  • 6 Votes
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Brinda
Brinda
Asked: December 14, 2020In: Class 9 Social Science

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m s⁻¹. Calculate the initial recoil velocity of the rifle.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-126 Questions No-3

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 1 1 Answer
  • 471 Views
  • 7 Votes
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Brinda
Brinda
Asked: December 13, 2020In: Class 9 Science

If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-65 Questions No-2

2020-2021cbsechapter 5class 9 scienceclass9ncertsciencethe fundamental unit of life
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