Explain the following:

Impulse

Important Questions on Laws of Motion

MEDIUM

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 3

Explain the following:

Impulsive force

EASY

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 1

Two objects have masses $8 \mathrm{kg}$ and $25 \mathrm{kg}$. Which one has more inertia? Why?

EASY

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 2

What is the momentum of a $6.0 \mathrm{kg}$ ball bowling with a velocity of $2.2 \mathrm{m} {\mathrm{s}}^{-1}$?

EASY

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 3

Two people push a car for $3 \mathrm{s}$ with a combined net force of $200 \mathrm{N}$. Calculate the impulse provided to the car.

MEDIUM

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 3

Two people push a car for $3 \mathrm{s}$ with a combined net force of $200 \mathrm{N}$. If the car has a mass of $1200 \mathrm{kg}$, what will be its change in velocity?

HARD

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 4

A force acts for $0.2 \mathrm{s}$ on an object having mass $1.4 \mathrm{kg}$ initially at rest. The force stops to act but the object moves through $4 \mathrm{m}$ in the next $2$ seconds. Find the magnitude of the force?

MEDIUM

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 5

An object of mass $5 \mathrm{kg}$ is moving with a velocity of $10 \mathrm{m} {\mathrm{s}}^{-1}$. A force is applied so that in $20 \mathrm{s}$, it attains a velocity of $25 \mathrm{m} {\mathrm{s}}^{-1}$. What is the force applied on the object?

MEDIUM

9th Telangana Board

IMPORTANT

Physical Science Class 9>Chapter 3 - Laws of Motion>Let us Improve our learning>Q 6

A hammer of mass $400 \mathrm{g}$, moving at $30 \mathrm{m} {\mathrm{s}}^{-1}$, strikes a nail. The nail stops the hammer in a very short time of $0.01 \mathrm{s}$. What is the force of the nail on the hammer?