define second law of motion
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The rate of change of momentum is directly proportional to Force Applied , Mathematically dp/dt proportional to F , F = kdp/dt = kd(mv)dt = kmdv/dt = kma if k= 1 F= ma
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Newton's second law states that acceleration of a particle is dependent on the forces acting upon the particle and the particle's mass. For a given particle, if the net force is increased, the acceleration is increased. For a given net force, the more mass a particle has, the less acceleration it has.
For example, weight is a force that we feel on Earth, caused by the gravity
For example, weight is a force that we feel on Earth, caused by the gravity
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Second law of Newton states that Force acting on a body is directly proportional to the rate of change of momentum...
Momentum is denoted by letter P and
calculated by P = m x v
Change in quantity = New qty - Original Qty
Here quantity can be Dispalcement ,Velocity , Momentum etc...
Change in velocity = final velocity - Initial velocity
Change in disp. = Final Disp - Initial Disp.
Similarly,
We can write
Change in momentum
= Final P - Initial P
= mv - mu
= m ( v-u )
Note that when we use word Rate...we simply divide the quantity by Time i.e, t
when we take a rate of cahnge of momentum which gives a force as follows
Rate of change of momentum
= ( Final P - Initial P ) / t
= ( mv - mu ) / t
= m [ ( v - u ) / t]
= m X a
=F
Second law of newton gives a measurement of Force which is calculated by F = m x a
Momentum is denoted by letter P and
calculated by P = m x v
Change in quantity = New qty - Original Qty
Here quantity can be Dispalcement ,Velocity , Momentum etc...
Change in velocity = final velocity - Initial velocity
Change in disp. = Final Disp - Initial Disp.
Similarly,
We can write
Change in momentum
= Final P - Initial P
= mv - mu
= m ( v-u )
Note that when we use word Rate...we simply divide the quantity by Time i.e, t
when we take a rate of cahnge of momentum which gives a force as follows
Rate of change of momentum
= ( Final P - Initial P ) / t
= ( mv - mu ) / t
= m [ ( v - u ) / t]
= m X a
=F
Second law of newton gives a measurement of Force which is calculated by F = m x a
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