(iii) Explain how a karate player can break a pile of tiles with a single blow of his hand. Define least count of any device. Similarly, small force applied for a long duration will cause the same change in momentum as a large force – Impulse force for a short duration. system is International System of Units. Filed Under: Class 9, Force and law of motion Tagged With: conservation of momentum, total momentum About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. This is the first part of the notes of Chapter9. Consider the following objects and calculate the magnitude of their momentum in SI units. (i) Define momentum. It is generally a good idea to gain an understanding of the "size" of units. How do you measure the effect of an impulsive force on the body? What is the full form of SI system? Question 3. Show that its SI unit is Ns. Define standard unit. Q2. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 9 Physics Forces and Laws of Motion. Force and Laws of Motion Class 9 Extra Questions Short Answer Questions-I. What is the ratio of SI units to CGS units of momentum? Answer: Unit is the quantity of a constant magnitude which is used to measure the magnitudes of other quantities of the same nature. Share 2. unit. Answer: A ratio of SI units to CGS units of momentum is (kg m/s)/(g cm/s) i.e., 10s. SI unit=kg m/s. Answer: Here you will get the CBSE Class 9 Science notes on chapter 11 ‘Work and Energy’. CBSE Class 9 Science notes for chapter 9 - Force and Laws of Motion are available here. Write its S.I. P = mυ SI unit of momentum is kg ms-1 Graphs (a) If m = constant P ∝ υ (b) If v = constant P ∝ m. Question 3. (c) Rate of change of momentum. Answer The entire NCERT textbook questions have been solved by best teachers for you. “Action and reaction are equal and opposite but … Define Momentum write its SI unit 2 See answers Brainly User Brainly User Momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity. Also write SI unit for each (CBSE 2015) Answer: (a) Initial momentum = mu Final momentum = mv (b) Change in momentum = final momentum – initial momentum = (mv – mu) = m(v – u) SI unit of initial momentum, final momentum and change of momentum is kg m s-1 SI unit of rate of change of momentum is kg m s-2 or N. So, Linear momentum p = mv. The momentum of (P) of an object is defined as the product of its mass (m) and velocity (υ). Question 4. it formula = mass × velocity so it's SI unit is = kg×m/s = kg m/s Hope this helps u thanks skyfall63 skyfall63 Linear momentum: Linear momentum of a body is the product of mass of the body and its velocity. 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