NCERT Solutions for Class 11-science Physics Chapter 4 - Motion in a Plane
Chapter 4 - Motion in a Plane Exercise 85
(a)The addition of two scalar quantities is meaningful only if they both represent the same physical quantity.
(b)The addition of a vector quantity with a scalar quantity is not meaningful.
(c) Yes, multiplying a vector by scalar is perfectly meaningful and gives a vector
in output having magnitude scalar times the magnitude of original vector. For example, force is multiplied with time to give impulse.
(d) Yes , product of two scalars is meaningful. For example, V=IR, multiplies scalars current and resistance to give voltage.
(e)The addition is meaningful if both the vectors have same dimensions.
(f)Yes, as both the vectors have same dimensions they can be added to give a vector output.
Chapter 4 - Motion in a Plane Exercise 86
Chapter 4 - Motion in a Plane Exercise 87
Chapter 4 - Motion in a Plane Exercise 88
Other Chapters for CBSE Class 11-science PhysicsChapter 2- Units and Measurements Chapter 3- Motion in a Straight Line Chapter 5- Laws of Motion Chapter 6- Work, Energy and Power Chapter 7- System of Particles and Rotational Motion Chapter 8- Gravitation Chapter 9- Mechanical Properties of Solids Chapter 10- Mechanical Properties of Fluids Chapter 11- Thermal Properties of Matter Chapter 12- Thermodynamics Chapter 13- Kinetic Theory Chapter 14- Oscillations Chapter 15- Waves
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