Question

The weight of a body is 12g. This statement is not correct because
(a) The correct symbol for the unit of weight has not been used.
(b) The correct symbol for gram is gm.
(c) The weight should be expressed in kg.
(d) Of some reason other than those given above.

Answer 1

Answer:

Option (b)The correct symbol for gram is g is the correct answer.

Explanation:

Conventionally, the weights of body are expected to have been mentioned everywhere in the SI units, but for the sake of convenience we use other unit systems so writing gram instead of kilogram is totally fine if the magnitudes are balanced accordingly.

Now, I think representing gram with g is quite a disputable idea. Being a physics student, g stands for acceleration due to gravity. So, writing gram as g instead of gm is a wrong way of representation, I suppose.

Lastly, if its about using the correct symbol for the weight then its totally correct. Its just that gram belongs to a different system of unit. It doesn't affect the value of it being decreased or increased.

Hope it helps! ;-))

Answer 2

This statement is not correct because  (a) The correct symbol for the unit of weight has not been used.

Explanation:

• Weight of an a body is the force of gravity acting on the body.
• Weight can be expressed as mass times gravitational acceleration.

$W=mg$ where $m$ is the mass of object and $g$ is the gravitational acceleration of earth.

• Weight is the measure of the gravitational force acting on the body.
• The force with which ground pulls the body towards its centre.
• Weight of any body is not fixed, it depends on the gravitational acceleration of the ground beneath it.
• Weight of any body on earth is not same as weight of the same body on any other planet.
• It is given in unit of force. SI unit of weight is Newton.
• So, here the statement should have been "The weight of a body is 12 N".