Question

(a) State Newton's first law of motion.
(b)Look at the diagrams given below and state in which case will the block move and in which direction. Give reason to support your answer.

CBSE Class IX Science SA 2 (3 Marks)

Answer 1

(a) Newton’s First Law of Motion : A body continues to be in a state of rest or in a state of uniform motion along a straight line unless an external force is applied on it to change the state.
(b)
The block will move in case (ii) and from right to left due to unbalanced forces.

Answer 2

Answer:

first law of motion says,"Every object continues in its state of rest , or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it."