Question

(a) What is meant by the terms mass and weight?

(b) Are they vector of scalar quantities? Why?

(c) The mass of a body is 30 kg. What is its weight on earth? (g = 9.8 m/s²)

(d) What is its weight on the moon? (g = 1.62 m/s²) 

Answer 1

(a) 1. The quantity of matter present in a body is called mass.

2. The force of attraction exerted by earth on a body is referred as weight.

(b) Mass is a scalar quantity (No direction) Weight is a vector quantity (Possess both magnitude and direction)

(c) Weight = mg = 30 × 9 = 294 N

(d) Weight on the moon = 30 × 1.62 = 48N