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[tex] \txtbf {NEWTON'S FIRST LAW OF MOTION} [\tex]
→According to Newton's first law of motion, a body continues to be in state of rest or state of uniform motion along a straight line, unless an external force is applied on it to change its state.
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NEWTON'S FIRST LAW CAN BE DERIVED FROM NEWTON'S SECOND LAW.
Acc to N-II law,
F=ma
F = m(v-u)/t
When external force is zero
0 = m(v-u)/t
0 = v-u
u=v
so initial velocity is equal to the final velocity without any external force which means that body at rest or a body in uniform motion continues to be in same state unless force is applied.
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We know,
F=ma
so
a= F/m
Here F= 200N m = 8kg
so a = 200/800
a= 0.25 m/s^2
→According to Newton's first law of motion, a body continues to be in state of rest or state of uniform motion along a straight line, unless an external force is applied on it to change its state.
---------####-----
NEWTON'S FIRST LAW CAN BE DERIVED FROM NEWTON'S SECOND LAW.
Acc to N-II law,
F=ma
F = m(v-u)/t
When external force is zero
0 = m(v-u)/t
0 = v-u
u=v
so initial velocity is equal to the final velocity without any external force which means that body at rest or a body in uniform motion continues to be in same state unless force is applied.
------------------#####-------
We know,
F=ma
so
a= F/m
Here F= 200N m = 8kg
so a = 200/800
a= 0.25 m/s^2
Answered by
3
hlo dear here is your ans .
Newton first law of motion......... according to this law a body which in rest or are in motion are don't change their position without apply external force . eg a ball is moving then after a period it will be stop due to an external friction force exerted by the earth...
Newton’s second law of motion states that the rate of change in momentum of a body is equal to the resultant force acting on the body in the direction of the resultant force. If the resultant force acting on a body is zero (due to the action of the balanced force), the rate of change in momentum also equals to zero, Where if the rate of the momentum of a body becomes zero it does mean that the final and initial momentums are equal to each other which is also means that the final and the initial velocities are equal, Which resembles the Newton’s law of inertia i.e., Newton’s first law of motion.( i.e., 'Any body in the universe continues in its state of rest or uniform motion in a straight line unless a resultant force acts on it to accelerate'. ......
Now your numerical ........we know force= mass× acceleration
then force = (200N). given
mass 800kg put the value in above realtion we get
F=m×a
200N=800kg×a
a=200N/800kg=1/4ms^2
Newton first law of motion......... according to this law a body which in rest or are in motion are don't change their position without apply external force . eg a ball is moving then after a period it will be stop due to an external friction force exerted by the earth...
Newton’s second law of motion states that the rate of change in momentum of a body is equal to the resultant force acting on the body in the direction of the resultant force. If the resultant force acting on a body is zero (due to the action of the balanced force), the rate of change in momentum also equals to zero, Where if the rate of the momentum of a body becomes zero it does mean that the final and initial momentums are equal to each other which is also means that the final and the initial velocities are equal, Which resembles the Newton’s law of inertia i.e., Newton’s first law of motion.( i.e., 'Any body in the universe continues in its state of rest or uniform motion in a straight line unless a resultant force acts on it to accelerate'. ......
Now your numerical ........we know force= mass× acceleration
then force = (200N). given
mass 800kg put the value in above realtion we get
F=m×a
200N=800kg×a
a=200N/800kg=1/4ms^2
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