Mass is the quantity of matter contained in a body. It is a measure of the inertia of a body.
Weight is the gravitational force acting on a body due to the Earth.
Weight (W) = mass (m) × acceleration due to gravity (g)
W = m g
Acceleration due to gravity on the Moon is approximately 1/6th of that on Earth.
Therefore, weight on Moon is:
Wmoon = (1/6) × Wearth
| Mass | Weight |
|---|---|
| Quantity of matter | Gravitational force on body |
| Scalar quantity | Vector quantity |
| Constant everywhere | Varies with location |
| SI unit: kg | SI unit: newton |
Q1. Mass of a body depends on: A) Location B) Gravity C) Shape D) Quantity of matter Answer: D Q2. Weight of a body depends on: A) Mass only B) Gravity only C) Mass and gravity D) Volume Answer: C Q3. SI unit of mass is: A) Newton B) Joule C) Kilogram D) Watt Answer: C Q4. SI unit of weight is: A) kg B) Joule C) Watt D) Newton Answer: D Q5. Which of the following is constant everywhere? A) Weight B) Acceleration due to gravity C) Mass D) Force Answer: C Q6. Weight of a body on Moon is: A) Same as Earth B) Double of Earth C) Half of Earth D) One-sixth of Earth Answer: D Q7. Weight is a: A) Scalar quantity B) Vector quantity C) Dimensionless quantity D) Constant quantity Answer: B Q8. A person has mass 60 kg on Earth. His mass on Moon will be: A) 10 kg B) 60 kg C) 360 kg D) 6 kg Answer: B Q9. A body weighs 600 N on Earth. Its weight on Moon will be: A) 100 N B) 600 N C) 3600 N D) 60 N Answer: A Q10. Relation between weight and mass is: A) W = m / g B) W = g / m C) W = m g D) W = m + g Answer: C
Mass is the quantity of matter and measure of inertia.
Weight is the gravitational force acting on a body.
W = m g
MCQs are frequently asked on difference between mass & weight, units, Moon-related questions and W = mg.
