EASY
9th CBSE
IMPORTANT
Earn 100

You get hurt when you kick a stone. Why?

Important Questions on Force and Laws of Motion

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q C
Explain why a bicycle stops if we stop pedalling.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q C
If we take out a piece of paper from under a book with a jerk, the book will not move. Explain?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q C
What changes can a force bring about on a body? Give one example of each.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q D

State the law of conservation of momentum. Explain how this law is valid for

a. recoiling of a gun

b. motion of a rocket

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q D
State Newton's three laws of motion. Calculate the magnitude of force required to produce an acceleration of 2 m/s2 in a body of mass 12.5 kg.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q E
What is the acceleration produced by a 12 N force acting on a 6 kg mass?  
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q E
How much is the force acting on a body of mass 5 kg, if it is accelerated by 2 m/s2.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Exercises>Q E

 A mass of 1000 kg having a speed of 10 m/s is brought to rest over a distance of 100 m. Find

a. the retardation

b. the retarding force.