Class 9 MCQ & Solution - Force and Laws of Motion, Science, Class 9 | EduRev Notes Summary and Exercise are very important for Newton's first law of motion states that everybody remains in its state of rest or of uniform unless it is compelled by an external force, acting on it which explains the concept of inertia. 6 - b. This, the acceleration of the ball is decreased and therefore, the impact of catching the fast moving ball is also reduced. 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CBSE Class 9th Science 9 - Force and laws of motion MCQs, https://shikshahouse.com/wp-content/uploads/2018/12/9-Force-and-Laws-of-Motion.jpg, https://shikshahouse.com/wp-content/uploads/2018/09/Logo-png-150x109.png, COPYRIGHT © 2018 - Shiksha House. Question.5: Qualitative definition of force 9 - b. energy to take him through long distance. When the brakes are applied the lower part of the body that is in contact with train comes to rest, but the upper part continuous to be in its state of motion, due inertia of motion. These MCQs are important from the exam point of view. (c) Inertia running the athlete gives himself larger inertia of motion. RD Sharma Solutions for Class 9 Mathematics, English Grammar (Communicative) Interact In English- Class 9, Class 9 Physics, Chemistry & Biology Tips & Tricks. Answer: According to Newton’s first law of motion, a body at rest or in uniform motion will remain at rest or in uniform motion unless an unbalanced force acts upon it. 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. a fielder in the ground gradually pulls his hand backward with the moving ball, in doing so, the fielder increases the time during which the high velocity of the moving ball decrease to zero. The rate of change of momentum of an object is proportional to. (c) F= a/m. by virtue of which the body is. (d) Unable to change by itself the state of rest or uniform motion in a straight line. accelerate until. However the direction of force is not given so it can’t be determined that it is moving away from the earth, Hence the correct answer is C. The v - t graph of a body of 5 kg moving with the help of a force is shown. Gravitational force is the weakest force in nature. moves forward with the horse. Here we have covered Important Questions on Force And Laws Of Motion for Class 9 Science subject.. Science Important Questions Class 9 are given below.. Friction between any two objects is caused due to the interlocking of irregularities present on the surface that are in contact. No. When no external force acts on an object, the physical quantity that remains conserved is. (e) A ball thrown upward in a train moving with uniform velocity returns to the thrower. 16 - c. 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