In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Downloads of CBSE Class 11 Physics Chapter 5 Case Study and Passage-Based Questions with Answers were Prepared Based on the Latest Exam Pattern. Students can solve Class 11 Physics Case Study Questions Laws of Motion to know their preparation level.
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In CBSE Class 11 Physics Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Laws of Motion Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 11 Physics Chapter 5 Laws of Motion
Case Study/Passage-Based Questions
Case Study 1: The first law refers to the simple case when the net external force on a body is zero. The second law of motion refers to the general situation when there is a net external force acting on the body. It relates the net external force to the acceleration of the body.
These qualitative observations lead to the second law of motion expressed by Newton as follows:
The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts. Thus, if under the action of a force F for time interval Δt, the velocity of a body of mass m changes from v to v + Δv i.e. its initial momentum
p = m v changes by Δp = mΔv. According to the Second Law
Where k is a constant of proportionality. Mathematically,
F = ma, the unit of force is kg-m/s2 or Newton, which has the symbol N. Let us note at this stage some important points about the second law:
- In the second law, F = 0 implies a = 0. The second law is obviously consistent with the first law.
- The second law of motion is a vector law.
- The second law of motion given by is applicable to a single point particle as well as to the rigid body but internal forces are not considered in F.
- The second law of motion is a local relation which means that force F at a point in space (location of the particle) at a certain instant of time is related to an at that point at that instant. Answer the following questions.
1) SI unit of force is
- a) Newton
- b) Pascal
- c) m/s
- d) None of the above
Answer: a) Newton
2) According to the second law of motion The rate of change of momentum of a body is directly proportional to
- a) Velocity of a body
- b) Applied force
- c) Only the mass of the body
- d) None of the above.
Answer: b) Applied force
3) The second law of motion is
- a) Vector law
- b) Scalar law
Answer: a) Vector law
4) Newton’s second law of motion is applicable to which of the following?
a) Only rigid bodies
b) Only single point particles
c) Both single point particles and rigid bodies
d) Neither single point particles nor rigid bodies
Answer: c) Both single point particles and rigid bodies
Which of the following statements is true regarding the second law of motion?
a) It is inconsistent with the first law of motion.
b) It only considers internal forces.
c) It is a vector law.
d) It is applicable to non-rigid bodies.
Answer: c) It is a vector law.
If a car with a mass of 1000 kg is accelerating at 2 m/s², what is the net force acting on the car?
a) 500 N
b) 1000 N
c) 2000 N
d) 5000 N
Answer: c) 2000 N
A body experiences no acceleration. What can be concluded about the net external force acting on it?
a) It is acting in the opposite direction to motion.
b) It is equal to the weight of the body.
c) It is zero.
d) It is infinite.
Answer: c) It is zero.
Case Study 2: The laws of motion, formulated by Sir Isaac Newton, are fundamental principles that describe the behavior of objects in response to external forces. Newton’s first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity unless acted upon by an external force. The second law of motion introduces the concept of force, stating that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. Mathematically, this law can be expressed as F = ma, where F is the net force, m is the mass of the object, and a is the acceleration produced. Newton’s third law of motion states that for every action, there is an equal and opposite reaction. This means that if object A exerts a force on object B, object B will exert an equal but opposite force on object A. These laws have been crucial in understanding and predicting the motion of objects in various physical scenarios.
Newton’s first law of motion is also known as the law of:
(a) Acceleration
(b) Inertia
(c) Force
(d) Action-reaction
Answer: (b) Inertia
According to Newton’s second law of motion, the acceleration of an object is directly proportional to the:
(a) Net force applied to it
(b) Displacement it undergoes
(c) Time it takes to move
(d) Initial velocity
Answer: (a) Net force applied to it
The mathematical representation of Newton’s second law of motion is given by:
(a) F = ma
(b) F = mv
(c) F = m/t
(d) F = mv^2
Answer: (a) F = ma
Newton’s third law of motion states that every action has an equal and opposite:
(a) Velocity
(b) Mass
(c) Inertia
(d) Reaction
Answer: (d) Reaction
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