Sort by: Top Voted. Equation (v) can be also written as =>a=F/m This equation is the form of Newton’s Second Law of Motion. A reference point or origin is, as the name suggests, a reference for us to verify whether an object is moving or not Newton's second law of motion describes that, when a force is applied to an object, it produces acceleration in the object (i.e rate of change of velocity). Therefore, we can find the force as follows: Newton's First Law of Motion: CBSE Class 9 IX ScienceSir Isaac Newton first presented his three laws of motion. The second law states that the force on an object is equal to its mass times its acceleration. An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. While Newton’s laws of motion may seem obvious to us today, centuries ago they were considered revolutionary. ... Normal force and contact force. Balanced Forces 4. We know that according to Newton’s second law of motion, force is a product of mass and acceleration. 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Taking the difference between point 1 and point 0, we get an equation for the force acting on the car as follows: Let us assume the mass to be constant. The momentum of a body with mass m and velocity v is given by  p = mv, Hence, the change in momentum of the car is given by, Hence, the net force acting on the car is given by, We calculate the force using the following formula, Substituting the values in the equation, we get. When two bodies interact, they apply force on each other that are equal in magnitude and opposite in direction. According newton’s third law of motion: To every action there is an equal and opposite reaction. These MCQ's are extremely critical for all CBSE students to score better marks. Up Next. Following are a few examples that we have listed to help you understand this point: When we kick a ball we exert force in a specific direction, which is the direction in which it will travel. Second Law of Motion Formula Solution: so, i feel comfortable with this app . 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