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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

Anant

Asked: December 14, 2020In: Class 10 Maths

ABC is an isosceles triangle with AC = BC. If AB² = 2AC² , prove that ABC is a right triangle.

NCERT Solutions for Class 10 Maths Chapter 6 Important NCERT Questions Triangles NCERT Books for Session 2022-2023 CBSE Board and UP Board Others state Board EXERCISE 6.5 Page No:150 Questions No:5

Rahul Singh

Asked: December 14, 2020In: Class 10 Maths

Prove that √5 is irrational.

NCERT Solutions for Class 10 Maths Chapter 1 Important NCERT Questions Real Numbers NCERT Books for Session 2022-2023 CBSE Board and UP Board Others state Board EXERCISE 1.3 Page No:11 Questions No:1

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

ABC is an isosceles triangle with AC = BC. If AB² = 2AC² , prove that ABC is a right triangle.

Prove that √5 is irrational.

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