{"id":32840,"date":"2024-02-29T10:30:13","date_gmt":"2024-02-29T05:00:13","guid":{"rendered":"https:\/\/samacheerkalvi.guide\/?p=32840"},"modified":"2024-02-29T17:23:16","modified_gmt":"2024-02-29T11:53:16","slug":"samacheer-kalvi-11th-physics-guide-chapter-3","status":"publish","type":"post","link":"https:\/\/samacheerkalvi.guide\/samacheer-kalvi-11th-physics-guide-chapter-3\/","title":{"rendered":"Samacheer Kalvi 11th Physics Guide Chapter 3 Laws of Motion"},"content":{"rendered":"

Tamilnadu State Board New Syllabus Samacheer Kalvi 11th Physics Guide<\/a> Pdf Chapter 3 Laws of Motion Text Book Back Questions and Answers, Notes.<\/p>\n

Tamilnadu Samacheer Kalvi 11th Physics Solutions Chapter 3 Laws of Motion<\/h2>\n

11th Physics Guide Laws of Motion Book Back Questions and Answers<\/h3>\n

\"Samacheer<\/p>\n

Part – I:
\nI. Multiple choice questions:<\/span><\/p>\n

Question 1.
\nWhen a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to _______.
\na) inertia of direction
\nb) inertia of motion
\nc) inertia of rest
\nd) absence of inertia
\nAnswer:
\na) inertia of direction<\/p>\n

Question 2.
\nAn object of mass m held against a vertical wall by applying horizontal force F as shown in the figure. The minimum value of the force F is _______ (IIT JEE 1994)
\n\"Samacheer
\na) Less than mg
\nb) Equal to mg
\nc) Greater than mg
\nd) Cannot determine
\nAnswer:
\nc) Greater than mg<\/p>\n

Question 3.
\nA vehicle is moving along the positive x-direction, if a sudden brake is applied, then _______.
\na) frictional force acting on the vehicle is along negative x-direction
\nb) frictional force acting on the vehicle is along the positive x-direction
\nc) no frictional force acts on the vehicle
\nd) frictional force acts in a downward direction
\nAnswer:
\na) frictional force acting on the vehicle is along the negative x-direction<\/p>\n

\"Samacheer<\/p>\n

Normal force formula<\/a> is the support force exerted upon an object that is in contact with another stable object.<\/p>\n

Question 4.
\nA book is at rest on the table which exerts a normal force on the book. If this force is considered as a reaction force, what is the action force according to Newton’s third law?
\na) Gravitational force exerted by Earth on the book
\nb) Gravitational force exerted by the book on Earth
\nc) Normal force exerted by the book on the table
\nd) None of the above
\nAnswer:
\nc) Normal force exerted by the book on the table<\/p>\n

Question 5.
\nTwo masses m1<\/sub> and m2<\/sub> are experiencing the same force where m1 <\/sub>< m2<\/sub>. The ration of their acceleration a1<\/sub>\/a2<\/sub> is _______.
\na) 1
\nb) less than 1
\nc) greater than 1
\nd) all the three cases
\nAnswer:
\nc) greater than 1<\/p>\n

Question 6.
\nChoose an appropriate free body diagram for the particle experiencing net acceleration along the negative y-direction. (Each arrow mark represents the force acting on the system).
\n\"Samacheer
\nAnswer:
\n\"Samacheer<\/p>\n

Question 7.
\nA particle of mass m sliding on the smooth double inclined plane (shown in the figure) will experience _______.
\n\"Samacheer
\na) greater acceleration along the path AB
\nb) greater acceleration along the path AC
\nc) same acceleration in both the paths
\nd) no acceleration in both the paths
\nAnswer:
\nb) greater acceleration along the path AC<\/p>\n

\"Samacheer<\/p>\n

Question 8.
\nTwo blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case, only a force F1<\/sub> is applied from the left. Later only a force F2<\/sub> is applied from the right. If the force acting at the interface of the two blocks in the two cases is the same, then F1<\/sub> : F2<\/sub> is _______. (Physics Olympiad 2016)
\n\"Samacheer
\na) 1 : 1
\nb) 1 : 2
\nc) 2 : 1
\nd) 1 : 3
\nAnswer:
\nc) 2 : 1<\/p>\n

Question 9.
\nForce acting on the particle moving with constant speed is _______.
\na) always zero
\nb) need not be zero
\nc) always non zero
\nd) cannot be concluded
\nAnswer:
\nb) need not be zero<\/p>\n

Question 10.
\nAn object of mass m begins to move on the plane inclined at an angle \u03b8. The coefficient of static friction of inclined surface is us. The maximum static friction experienced by the mass is _______.
\na) mg
\nb) \u03bcs<\/sub> mg
\nc) \u03bcs<\/sub> mg sin \u03b8
\nd) \u03bcs<\/sub> mg cos \u03b8
\nAnswer:
\nd) \u03bcs<\/sub> mg cos \u03b8<\/p>\n

Question 11.
\nWhen the object is moving at a constant velocity on the rough surface _______.
\na) net force on the object is zero
\nb) no force acts on the object
\nc) only external force acts on the object
\nd) only kinetic friction acts on the object
\nAnswer:
\na) net force on the object is zero<\/p>\n

Question 12.
\nWhen an object is at rest on the inclined rough surface _______
\na) static and kinetic frictions acting on the object is zero
\nb) static friction is zero but kinetic friction is not zero.
\nc) static friction is not zero and kinetic friction is zero.
\nd) static and kinetic frictions are not zero.
\nAnswer:
\nc) static friction is not zero and kinetic friction is zero.<\/p>\n

Question 13.
\nThe centrifugal force appears to exist _______.
\na) only in inertial frames
\nb) only in rotating frames
\nc) in an accelerated frame
\nd) both in inertial and non-inertial frames
\nAnswer:
\nb) only in rotating frames<\/p>\n

\"Samacheer<\/p>\n

Question 14.
\nChoose the correct statement from the following.
\na) Centrifugal and centripetal forces are action-reaction pairs.
\nb) Centripetal forces is a natural force.
\nc) Centrifugal force arises from the gravitational force.
\nd) Centripetal force acts towards the center and centrifugal force appears to act away from the center in a circular motion.
\nAnswer:
\nd) Centripetal force acts towards the center and centrifugal force appears to act away from the center in a circular motion.<\/p>\n

Question 15.
\nIf a person moving from pole to equator, the centrifugal force acting on him
\na) increase
\nb) decreases
\nc) remains the same
\nd) increase and then decreases
\nAnswer:
\na) increase<\/p>\n

\"Samacheer<\/p>\n

II. Short Answer Questions:<\/span><\/p>\n

Question 1.
\nExplain the concept of Inertia. Write two examples each for Inertia of motion, inertia of rest and inertia of direction.
\nAnswer:
\nThe inability of objects to move on its own or change its state of motion is called inertia. Inertia means resistance to change its state. There are three types of inertia:
\n1. Inertia of rest:
\nThe inability of an object to change its state of rest is called inertia of rest.
\nExample:<\/p>\n