(iii) Explain how a karate player can break a pile of tiles with a single blow of his hand. Q2. Answer: Define linear momentum. It is generally a good idea to gain an understanding of the "size" of units. Write its S.I. What is the full form of SI system? “Action and reaction are equal and opposite but … Question 4. Class-9 » Physics. (i) Define momentum. system is International System of Units. Answer: A ratio of SI units to CGS units of momentum is (kg m/s)/(g cm/s) i.e., 10s. So, Linear momentum p = mv. ... sI unit of Power is Joule per second or Js1. CBSE Class 9 Science notes for chapter 9 - Force and Laws of Motion are available here. it formula = mass × velocity so it's SI unit is = kg×m/s = kg m/s Hope this helps u thanks skyfall63 skyfall63 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. Define standard unit. Question 3. 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. The momentum of (P) of an object is defined as the product of its mass (m) and velocity (υ). (ii) How much momentum will an object of mass 10 kg transfer to the floor, if it falls from a height of 5 m (g =10 m/s 2). Answer The same force acting on the same body for a long duration of time will cause a greater change in its linear momentum as compared to the same for a short duration. Share 2. Define least count of any device. The entire NCERT textbook questions have been solved by best teachers for you. (c) Rate of change of momentum. Consider the following objects and calculate the magnitude of their momentum in SI units. 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? 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. 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. Answer: Unit is the quantity of a constant magnitude which is used to measure the magnitudes of other quantities of the same nature. 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. 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. SI unit=kg m/s. Linear momentum: Linear momentum of a body is the product of mass of the body and its velocity. How do you measure the effect of an impulsive force on the body? Answer: The full form of S.I. Show that its SI unit is Ns. Here you will get the CBSE Class 9 Science notes on chapter 11 ‘Work and Energy’. Share with your friends. unit. This is the first part of the notes of Chapter9. Question 1. Notes on chapter 11 ‘ Work and Energy ’ measure the effect of an impulsive force the... 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