One Newton is equivalent to A. 1 kg. wt B. 9.81 kg. wt C. 981 dyne D. $$\frac{1}{{9.81}}$$ kg. wt

The correct answer is A. 1 kg. wt.

One Newton is the force required to accelerate a mass of one kilogram at a rate of one meter per second squared. In other words, if you apply a force of one Newton to a mass of one kilogram, it will accelerate at a rate of one meter per second squared.

One kilogram weight is the force of gravity on a mass of one kilogram at sea level on Earth. This force is equal to 9.81 Newtons.

One dyne is the force required to accelerate a mass of one gram at a rate of one centimeter per second squared. This is a very small unit of force.

$$\frac{1}{{9.81}}$$ kg. wt is not a valid unit of force.