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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

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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

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

Aabha

Asked: November 24, 2020In: Class 7 Science

Explain how soil pollution and soil erosion could be prevented.

NCERT Solutions for Class 9 Science Chapter 8 Important NCERT Questions 7th Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 9

Aabha

Asked: November 24, 2020In: Class 7 Science

Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.

NCERT Solutions for Class 9 Science Chapter 8 Important NCERT Questions 7th Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 8

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.

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

Explain how soil pollution and soil erosion could be prevented.

Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.

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