What is newton's second law of motion?Also give example.
<u>Definition</u>:-
Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force. ie., <u>F=ma</u>.
<u>Examples:-</u>
- When you are kicking a ball, you are increasing the speed by applying force to it. Therefore,it accelerates.
- If you use the same force to push a truck and push a car, the car will have more acceleration than the truck.
Derivation:-
For a body of mass 'm' , whose velocity changes from u to v in time t, when Force 'F' is applied.
=>Force∝Change in momentum/Time
=>F∝mv-mu/t
=>F∝m(v-u)/t
=>F∝ma
=>F=kma(a=v-u/t)
=>F=ma(Since k=constant=1)
Answer:
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Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object. Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object.
convergent,convectional, frontal , orographic
My answer to the problem is as follows:
<span>1. Use the kinematic formula
Vf = Vi + a*t
for a, Vi = 3.0 m/s, a = 0.5 m/s/s, and t = 7.o s.
for b, Vf = 0, Vi = 3.0 m/s, and a = -0.60 m/s/s.
I hope my answer has come to your help. God bless and have a nice day ahead!
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