"The relationship between an object's mass m, its acceleration a, and the applied force F is F= ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector."
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Consistent with the first law, the time derivative of the momentum is non-zero when the momentum changes direction, even if there is no change in its magnitude; such is the case with uniform circular motion. The relationship also implies the conservation of momentum: when the net force on the body is zero, the momentum of the body is constant. Any net force is equal to the rate of change of the momentum.
F = m. a
From that, we can immediately calculate the force obtained by an object through the acceleration and the mass possessed. The resulting force is an application of Newton's Second Law
Example,
A mass of 500 kilograms of the car being pushed by a man strike that has a speed of 10 km / h. What is the force that carried out on the car?
answer :
m : 500 Kg
a : 10 km/h
F = m.a
500 x 10 = 5000 N
so, the man pushed the car by 5000 N of force
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