Class 9

Asked: October 27, 2020In: Class 9

A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m s-2, with what velocity will it strike the ground? After what time will it strike the ground?

NCERT Solutions for Class 9 Science Chapter 8 Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-113 Questions No-7

Srishti Singhania

Asked: October 27, 2020In: Class 9

State which of the following situations are possible and give an example for each of these:

NCERT Solutions for Class 9 Science Chapter 8 Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-113 Questions No-9 State which of the following situations are possible and give an example for each of these: (a) ...

Srishti Singhania

Asked: October 27, 2020In: Class 9

An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

NCERT Solutions for Class 9 Science Chapter 8 Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-113 Questions No-10

Ishank Singh

Asked: October 27, 2020In: Class 9

Which of the following has more inertia?

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-118 Questions No-1 Which of the following has more inertia? (a) a rubber ball and a ...

Ishank Singh

Asked: October 27, 2020In: Class 9

In the following example, try to identify the number of times the velocity of the ball changes: “A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team”. Also identify the agent supplying the force in each case.

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-118 Questions No-2

Ishank Singh

Asked: October 27, 2020In: Class 9

Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

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-118 Questions No-3

Ishank Singh

Asked: October 27, 2020In: Class 9

Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

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-118 Questions No-4

Ishank Singh

Asked: October 27, 2020In: Class 9

If action is always equal to the reaction, explain how a horse can pull a cart.

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-1

Ishank Singh

Asked: October 27, 2020In: Class 9

Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

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-2

Ishank Singh

Asked: October 27, 2020In: Class 9

Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2 m s–1 and 1 m s–1, respectively. They collide and after the collision, the first object moves at a velocity of 1.67 m s–1. Determine the velocity of the second object.

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-4

Category: Class 9

A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m s-2, with what velocity will it strike the ground? After what time will it strike the ground?

State which of the following situations are possible and give an example for each of these:

An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

Which of the following has more inertia?

Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

If action is always equal to the reaction, explain how a horse can pull a cart.

Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.

Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2 m s–1 and 1 m s–1, respectively. They collide and after the collision, the first object moves at a velocity of 1.67 m s–1. Determine the velocity of the second object.

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Category: Class 9

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