Question

applications of 3 laws of motion
in pool, a ball remains at rest until hit by a cue
stick or another ball
when pushing an object, it takes a con
to start the object moving
coaches use the principle of force, m
acceleration to train athletes
a rocket expels hot gas downwards,
pushes the rocket upward
an airplanes engine forces air backward, and this
results in a forward thrust that pushes the
airplane forward

Explanation:

Newton's laws of motion are fundamental principles in physics. The Law of Inertia (First Law) states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force. The Law of Acceleration (Second Law) is \(F = ma\) (force equals mass times acceleration). The Law of Interaction (Third Law) says that for every action, there is an equal and opposite reaction.

• For "IN POOL, A BALL REMAINS AT REST UNTIL HIT BY A CUE STICK OR ANOTHER BALL": This is an example of the Law of Inertia. The ball is at rest (initial state) and an external force (cue stick or another ball) is needed to change its state of motion.
• For "WHEN PUSHING AN OBJECT, IT TAKES A CON TO START THE OBJECT MOVING": This is also related to the Law of Inertia. The object has a tendency to stay at rest (inertia), and a force (pushing) is required to overcome this and start the motion.
• For "COACHES USE THE PRINCIPLE OF FORCE, M ACCELERATION TO TRAIN ATHLETES": This is based on the Law of Acceleration (\(F = ma\)). Coaches can manipulate force and mass - acceleration relationships (e.g., increasing an athlete's force output for a given mass to increase acceleration)
• For "A ROCKET EXPELS HOT GAS DOWNWARDS, PUSHES THE ROCKET UPWARD": This is an example of the Law of Interaction. The expulsion of gas downward (action) results in an upward force (reaction) on the rocket.
• For "AN AIRPLANE’S ENGINE FORCES AIR BACKWARD, AND THIS RESULTS IN A FORWARD THRUST THAT PUSHES THE AIRPLANE FORWARD": This is the Law of Interaction. The force on the air backward (action) causes a forward force (reaction) on the airplane.

Answer:

• "IN POOL, A BALL REMAINS AT REST UNTIL HIT BY A CUE STICK OR ANOTHER BALL": Law of Inertia
• "WHEN PUSHING AN OBJECT, IT TAKES A CON TO START THE OBJECT MOVING": Law of Inertia
• "COACHES USE THE PRINCIPLE OF FORCE, M ACCELERATION TO TRAIN ATHLETES": Law of Acceleration
• "A ROCKET EXPELS HOT GAS DOWNWARDS, PUSHES THE ROCKET UPWARD": Law of Interaction
• "AN AIRPLANE’S ENGINE FORCES AIR BACKWARD, AND THIS RESULTS IN A FORWARD THRUST THAT PUSHES THE AIRPLANE FORWARD": Law of Interaction