Force and Laws of Motion MCQ Questions Class 9 Science Chapter 9
NCERT MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion. Force and Laws of Motion MCQ Questions with Answers from Class 9 Science.
Force and Laws of Motion MCQ Questions Class 9 Science Chapter 9
Force and Laws of Motion Multiple Choice Questions with Answers Class 9 Science Chapter 9 PDF is available.
1.) —- is responsible for change in magnitude of speed.
A) Momentum
B) Force
C) Inertia
D) Kinetic energy.
Answer: B) Force
2.) In the absence of external force the velocity —–.
A) Remains constant.
B) Vanishes.
C) Changes continuously.
D) None of these.
Answer: A) Remains constant.
3.) Newton’s first law introduces the concept of —-.
A) Momentum
B) Inertia
C) Conservation of energy.
D) Action and reaction.
Answer: B) inertia
4.) Newton’s first law introduces the concept of —-.
A) Momentum
B) Inertia
C) Conservation of energy.
D) Action and reaction.
Answer: A) momentum.
In case you are missed :- Previous Chapter MCQ Questions
5.) State of rest and state of motions are—_
A) Equal
B) Unequal
C) None of these
D) Can not say.
Answer: A) equal.
6.) Which object has greater inertia.
A) Rubber ball
B) Gas cylinder
C) Bicycle
D) Truck
Answer: D) Truck. Inertia is depend on mass of the object.
7.) Momentum of the object is depend on.
A) Mass
B) Velocity
C) Mass and velocity
D) Force.
Answer: momentum is depend on mass and velocity of the object.
8.) According to third law of motion, Action and reactions are happened at —–.
A) Same time
B) At different time
C) Action happened first and then reaction.
D) Reaction happened first and then action.
Answer: A) same time.
9.) Atrain of 10 wagon moves with constant velocity of 40 m/s for 3 minutes. The mass of each wagon is 10000 kg. Calculate net force on each wagon.
A) 500 N
B) 1000 N
C) 0 N
D) Insufficient data to calculate force.
Answer: C) 0 N.
10.) A wooden block of mass 20 kg accelerate at the rate of 4 m/s². Calculate applied force on the block.
A) 20 N
B) 40 N
C) 70 N
D) 80 N
Answer: D) 80 N.
Given, Mass = 20 kg, Acceleration = 4 m/s².
According to second law of motion,
Force = mass × acceleration
Force = 20 × 4
Force = 80 N
In case you are missed :- Next Chapter MCQ Questions
