Question

State Newton's First Law of Motion (Law of Inertia) and its application in sports.

Hint:

Inertia is the resistance of a body to change its state of rest or motion.

Answer 1

Concept: Newton’s First Law of Motion is also known as the Law of Inertia. It explains the behavior of objects when no external force acts upon them. Inertia is the tendency of a body to resist any change in its state of rest or motion.
Step 1: Statement of Newton’s First Law.
Newton’s First Law states that: \textit{“An object remains at rest or continues to move with uniform velocity in a straight line unless acted upon by an external unbalanced force.”}
Step 2: Application in Sports.

• A football remains at rest until a player kicks it.
• A moving cricket ball continues to move until friction or a fielder stops it.
• A sprinter at the starting block remains at rest until force is applied at the start signal.
• A hockey player must apply force to stop or change the direction of a moving ball.

Final Answer: Newton’s First Law of Motion states that an object remains at rest or in uniform motion unless acted upon by an external unbalanced force. In sports, this law explains why a ball does not move until kicked and why force is required to stop or change the motion of a moving object.