Case Study Questions for Class 11 Physics Chapter 5 Laws of Motion

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Case Study Questions for Class 11 Physics Chapter 5 Laws of Motion

Here we are providing case study questions for class 11 physics chapter 5 laws of motion. Students can practice these questions for better understanding of case study type questions.

Table of Contents

Case Study Questions:

Question 1:

Conservation of Momentum
This principle is a consequence of Newton’s second and third laws of motion.
In an isolated system (i.e., a system having no external force), mutual forces (called internal forces) between pairs of particles in the system causes momentum change in individual particles.
Let a bomb be at rest, then its momentum will be zero. If the bomb explodes into two equal parts, then the parts fly off in exactly opposite directions with same speed, so that the total momentum is still zero. Here, no external force is applied on the system of particles (bomb).

(i) A shell of mass 10 kg is moving with a velocity of 10 ms^-1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the first mass is stationary, the velocity of the second is
(a) 1 m/s
(b) 10 m/s
(c) 100 m/s
(d) 1000 m/s

Check Answer

Answer: (c)

(ii) A bullet of mass 10 g is fired from a gun of mass 1 kg with recoil velocity of gun 5 m/s. The muzzle velocity will be
(a) 30 km/min
(b) 60 km/min
(c) 30 m/s
(d) 500 m/s

Check Answer

Answer: (d)

(iii) A bullet of mass 0.1 kg is fired with a speed of 100 m/s. The mass of gun being 50 kg, then the velocity of recoil becomes
(a) 0.05 m/s
(b) 0.5 m/s
(c) 0.1 m/s
(d) 0.2 m/s

Check Answer

Answer: (d)

(iv) Two masses of M and 4M are moving with equal kinetic energy. The ratio of their linear momenta is
(a) 1:8
(b) 1:4
(c) 1:2
(d) 4:1

Check Answer

Answer: (c)

(v) A unidirectional force F varying with time T as shown in the figure acts on a body initially at rest for a short duration 2T. Then, the velocity acquired by the body is

(a) πF₀T/4m
(b) πF₀T/2m
(c) F₀T/4m
(d) zero

Check Answer

Answer: (d)

Case Study Questions for Class 11 Physics Chapter 15 Waves

Case Study Questions for Class 11 Physics Chapter 14 Oscillations

Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

Case Study Questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids

Case Study Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids

Case Study Questions for Class 11 Physics Chapter 8 Gravitation

Case Study Questions for Class 11 Physics Chapter 7 System of Particles and Rotational Motion

Case Study Questions for Class 11 Physics Chapter 6 Work Energy and Power

Case Study Questions for Class 11 Physics Chapter 4 Motion In A Plane

Case Study Questions for Class 11 Physics Chapter 3 Motion in a Straight Line

Case Study Questions for Class 11 Physics Chapter 2 Units and Measurements

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