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