Question

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Answer 1

Answer:

a) the masses produce of force to stretch the spring with the help of gravitational force.

b) gravity is a vector quantity because direction is considered while measuring the force of pull. For example when a ball is thrown in the upward direction the gravitational force is considered to be negative

Answer 2

Explanation:

1) The masses have the tendency to move downward due to their weight ( W = F*g ) i.e due to the gravitational force acting on them, due to this pull, the spring gets stretched.

2) Gravitational force pulls the object to itself i.e it acts in a negative direction. It is called as a vector quantity because it possesses both direction and magnitude