Question

$1gf$ is equal to
A. $105dyne$
B. $981dyne$
C. $9.8N$
D. $1N$

Answer 1

We can approach this problem with the conversion of units into a different system for the same physical quantities. There are so many systems present which help us in the conversion of units into other units such as the international system of units (also known as SI system), metric system, natural units , English units and imperial units.

Complete answer:
The international system of unit (SI) is a new form of metric units which have seven fundamental units which are second, metre, kilogram, ampere, kelvin, mole, and candela. They are the sets with the help of which all other SI units can be derived.

Force is the pull or the interaction that acts on an object and changes the motion of the object so it can cause an object with mass to change its velocity. It can be shown as $F,\overrightarrow F$ and SI unit of force is newton$\left( N \right)$, other units are dyne, pound, poundal, kilopound. Its dimension is $\left[ {LM{T^{ - 2}}} \right]$. Formula used for the calculation is $F = ma$ where $m$ is the mass of the object and $a$ is the acceleration of the object.

In the given question, all the given options have the units of force in different systems.
For the conversion of gram force $\left( {gf} \right)$ to dyne values in the force units scale, we know that $1gf = 981dyn$ where $dyn$is the unit of force in another system. So for the given question option B is correct which is $981dyn$.

So, the correct answer is “Option B”.

Note:
In measurement, accuracy and precision is also an important factor. Accuracy is the proximity or closeness of the measurements to a specific value and precision is the closeness of the measurements to each other.