Question

1kg weight is equal to
A) 980000 dynes
B) 9.80 dynes
C) 98 dynes
D) None of these

Answer 1

Hint:Weight of body does not mean the mass of the body, weight of the body is gravitational force multiplied by acceleration of gravity.
g = 9.8 m/sec

Complete Step by step solution: Weight of 1 kg mass
$\eqalign{
  & {\text{weight = mass }} \times {\text{ gravitational force}} \cr
  & \Rightarrow {\text{ weight = m }} \times {\text{ g}} \cr
  & \Rightarrow {\text{ weight = 1 }} \times {\text{ 9}}{\text{.8}} \cr
  & \Rightarrow {\text{ weight = 9}}{\text{.8 N}} \cr
  & {\text{1 newton force = 100000 dynes}} \cr
  & {\text{Thus, weight of force in dynes of 1 kg mass = 9}}{\text{.8 }} \times {\text{ 1}}{{\text{0}}^5}{\text{ dynes}} \cr} $

Hence option A is correct

Additional Information: Weight is a force and is equal to the mass of the object multiplied by the acceleration due to gravity (which is 9.8 meters per square). Weight, thus, depends on the body it is on. For example, on Earth, something weighing 60kg would only weigh 6kg on the Moon, because the variable "gravity due to acceleration" changes from body to body (in its turn gravity is also based on mass).
Multiplying that acceleration by a constant "mass", we can calculate the weight of an object. Weight is actually a type of force that became popular due to human daily needs.

Notes: Kilogram (kg) is the SI unit of mass or weight and is widely used in mathematics and science.

1 kg is also equal to the mass of about 1 liter of water.

Although it is used to measure both mass and weight, it is the base unit of mass. The basic difference between mass and load lies in its dependence on gravity.