Difference between First law and Second law of motion
First law of motion
1.) Newton’s first law illustrates the necessity of unbalanced force to change the state of object from rest to motion or motion to rest.
2.) Newton’s first law states that ‘an object remains in state of rest or state of uniform motion along straight line unless and external unbalanced force acts on it.’
3.) First law indicates that to change the state of object, inertia should be overcome by applying force greater that its own force.
4.) Eg. If want to move a stone at the peak of mountains, we need to apply the force which should be greater than its weight.
Second law of motion
1.) Newton’s second law illustrates the necessity of change of momentum to change the inertia of object.
2.) Newton second law states as ‘rate of change of momentum is directly proportional to the impressed force and the change in momentum is takes towards the direction of applied force.’
3.) This law indicates that the momentum of object should be change to make an impact on object.
4.) The formula for Newton’s second law of motion can be given as,
∴ F = m a
Where ‘m’ is mass of object and ‘a’ is the acceleration of object.
5.) Eg. To find the force exerted on wall by a ball of mass 50 g thrown with acceleration of 10 m/s2 will be,
∴ F = 0.05 × 10 = 0.5 N