What is inertia?

Important Questions on Force and Laws of Motion

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 3

What is momentum?

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 4

What is balanced force?

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 5

Give one application of Newton’s third law of motion.

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 6

Why are roads on mountains inclined inwards at turns?

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 7

What change will a force bring in a body?

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 8

Why do you think it is necessary to fasten your seat belts while travelling in your vehicle?

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 9

From the rifle of mass $4 \mathrm{kg}$, a bullet of mass$50 \mathrm{g}$ is fired with an initial velocity of$35 \mathrm{m}/\mathrm{s}$. Calculate the initial recoil velocity of the rifle.

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 9 - Force and Laws of Motion>TEST YOUR SKILLS>Q 10

A stone of $1 \mathrm{kg}$ is thrown with a velocity of $20 \mathrm{m}/\mathrm{s}$ across the frozen surface of a lake and comes to rest after travelling a distance of $50 \mathrm{m}$. The force of friction between the stone and the ice is calculated as $-k \mathrm{N}$. Give the value of $k$.