Question

What is the mass of an object whose weight is 980 N?

• A. 980 kg
• B. 98 kg
• C. 100 kg
• D. zero

Answer 1

The correct option is C 100 kg

The most common definition of weight is the force exerted on a body by gravity. This is often expressed in the formula W = mg, where W is the weight, m the mass of the object, and g gravitational acceleration, $g=9.81$ on a surface of the earth.

so if $W=980N$ then $m=\frac{W}{g}=\frac{980}{9.81}=100kg$

so option C is correct.