Class 9

Asked: October 27, 2020In: Class 9

A hockey ball of mass 200 g travelling at 10 m s–1 is struck bya hockey stick so as to return it along its original path with a velocity at 5 m s–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

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-129 Questions No-13

Krisha Prasad

Asked: October 27, 2020In: Class 9

A bullet of mass 10 g travelling horizontally with a velocity of 150 m s–1 strikes a stationary wooden block and comes to rest in 0.03 s. Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude

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-129 Questions No-14

Krisha Prasad

Asked: October 27, 2020In: Class 9

An object of mass 1 kg travelling in a straight line with a velocity of 10 m s–1 collides with, and sticks to, a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined 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 Exercises Questions Page No-129 Questions No-15

Krisha Prasad

Asked: October 27, 2020In: Class 9

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s–1 to 8 m s–1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the 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 Exercises Questions Page No-129 Questions No-16

Krisha Prasad

Asked: October 27, 2020In: Class 9

How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 m s–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-129 Questions No-18

Prisha Garg

Asked: October 22, 2020In: Class 9

How would you confirm that a colourless liquid given to you is pure water?

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No- 6

Prisha Garg

Asked: October 22, 2020In: Class 9

Explain the following giving examples. (a) saturated solution (b) pure substance (c) colloid (d) suspension.

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No- 4

Prisha Garg

Asked: October 22, 2020In: Class 9

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No-5

Sriansh Singh

Asked: October 22, 2020In: Class 9

Which separation techniques will you apply for the separation of Tea leaves from tea.

NCERT Solution for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-28 Questions No-1 Part-7

Sriansh Singh

Asked: October 22, 2020In: Class 9

Which separation techniques will you apply for the separation of Iron pins from sand.

NCERT Solution for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-28 Questions No-1 Part-8

Category: Class 9

A hockey ball of mass 200 g travelling at 10 m s–1 is struck bya hockey stick so as to return it along its original path with a velocity at 5 m s–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

A bullet of mass 10 g travelling horizontally with a velocity of 150 m s–1 strikes a stationary wooden block and comes to rest in 0.03 s. Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s–1 to 8 m s–1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 m s–2.

How would you confirm that a colourless liquid given to you is pure water?

Explain the following giving examples. (a) saturated solution (b) pure substance (c) colloid (d) suspension.

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

Which separation techniques will you apply for the separation of Tea leaves from tea.

Which separation techniques will you apply for the separation of Iron pins from sand.

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