MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion

Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Force and Laws of Motion Class 9 MCQs Questions with Answers and assess their preparation level.

Force and Laws of Motion Class 9 MCQs Questions with Answers

Solving the Force and Laws of Motion Multiple Choice Questions of Class 9 Science Chapter 9 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Force and Laws of Motion Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 9 Science Class 9 and cross-check your answers during preparation.

Multiple Choice Questions

Question 1.
Rocket works on the principle of conservation of:
(a) mass
(b) energy
(c) momentum
(d) velocity

Answer

Answer: (c) momentum


Question 2.
Among the equal-sized stone and a football, the inertia will be higher of:
(a) football
(b) stone
(c) both
(d) none of them

Answer

Answer: (b) stone


Question 3.
A batsman hits a cricket ball which then rolls on the ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because:
(a) the batsman did not hit the ball hard enough.
(b) velocity is proportional to the force exerted on the ball.
(c) there is a force on the ball opposing the motion.
(d) there is no unbalanced force on the ball so the ball would want to come to rest.

Answer

Answer: (c) there is a force on the ball opposing the motion.


Question 4.
What is the momentum of an object of mass m, moving with a velocity v?
(a) (mv)2
(b) mv2
(c) \(\frac{1}{2}\) mv2
(d) mv

Answer

Answer: (d) mv


Question 5.
Friction is:
(a) useful to us
(b) harmful to us
(c) both useful as well as harmful to us
(d) none of them.

Answer

Answer: (c) both useful as well as harmful to us


Fill in the Blanks.

Question 6.
The SI unit of momentum is _________.

Answer

Answer: kgms-1


Question 7.
The natural tendency of objects to resist a change in their state of rest or of uniform motion is called ______

Answer

Answer: inertia


Question 8.
To every action, there is an ______ and opposite reaction.

Answer

Answer: equal


Question 9.
The resultant force of balanced forces is ________

Answer

Answer: zero


Question 10.
The force can change the motion, direction, or _______ of an object.

Answer

Answer: shape


Question 11.
The value of inertia depends on the _______ of an object.

Answer

Answer: mass


Question 12.
The rate of change of momentum of an object is ______ to the applied unbalanced force in the direction of the force.

Answer

Answer: proportional


True/False.

Question 13.
In 1586, Galileo Galilei wrote his first scientific book ‘The Little Balance’.

Answer

Answer: True


Question 14.
In practical situations, it is difficult to achieve a zero balanced force.

Answer

Answer: False


Question 15.
Force is a scalar quantity.

Answer

Answer: False


Question 16.
The mass of an object is a measure of its inertia.

Answer

Answer: True


Question 17.
In an isolated system, the total momentum remains conserved.

Answer

Answer: True


Match the Column.

Question 18.

A B
1. Unit of force (i) Mass × acceleration
2. Unit of pressure (ii) kgms-1
3. Test of purity of milk (iii) Pascal
4. Force (iv) Lactometer
5. S.I unit of momentum (v) Newton
Answer

Answer:

A B
1. Unit of force (v) Newton
2. Unit of pressure (iii) Pascal
3. Test of purity of milk (iv) Lactometer
4. Force (i) Mass × acceleration
5. SI unit of momentum (ii) kgms-1

Answer in one Word/Sentence.

Question 19.
Write the unit of pressure.

Answer

Answer: Nm-1 or pascal


Question 20.
A body is moving with constant velocity, then what will be the acceleration of that body?

Answer

Answer: Zero (0)


Question 21.
Write the S.I unit of force.

Answer

Answer: Newton


Question 22.
On what factor the inertia of an object depends?

Answer

Answer: On mass


Question 23.
Express the second law of motion of newton in the context of the equation of momentum.

Answer

Answer: Force = \(\frac{\text { Change in momentum } \Delta P}{\text { time }}=\frac{m(v-u)}{t}\)


Hope the information shared regarding the NCERT MCQ Questions for Class 9 Science Chapter 9 Force and Laws of Motion with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 9 Science Force and Laws of Motion MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.

error: Content is protected !!