state the newtons secound law of motion and derive the expression for force
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Newton's second law of motion states that, "The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which force acts". Now, momentum is the product of mass and velocity. Thus, change in momentum is. Thus, we have. But, is the acceleration of the body.
Derive the expression
F=ma. ... Then the force is the product of mass and acceleration. Hence the unit of force is Newton or kgm2.
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