EASY
9th CBSE
IMPORTANT
Earn 100

What changes can a force bring about on a body? Give one example of each.

Important Questions on Force and Laws of Motion

MEDIUM
9th CBSE
IMPORTANT

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
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
What is the acceleration produced by a 12 N force acting on a 6 kg mass?  
EASY
9th CBSE
IMPORTANT
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

 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.

EASY
9th CBSE
IMPORTANT
A truck starting from rest moves down a hill with a constant acceleration. If it covers a distance of 300 m in 10 s, find its acceleration. Also find the force acting on it if its mass is 8000 kg.
HARD
9th CBSE
IMPORTANT
A certain force exerted for 0.5 s raises the speed of an object from 2.4 m/s to 4.9 m/s. Later the same force is applied for 2.5 s. How much does the speed of object change in 2.5 s?
EASY
9th CBSE
IMPORTANT
A dumb-bell of 5 kg mass falls from a height of 0.4 m. What is the momentum transferred by the dumb bell while hitting the ground?