newtons laws of motion

what is newtons first law?

Law of inertia

what is meant by the law of inertia in sport?

a performer will remain still or move in a constant velocity unless a force is applied

when is inertia used?

• when moving at a constant velocity

• when completely still

is inertia constant?

no, a new force has to be applied after inertia has been slightly overcome

explain how newtons first law applies to a swimmer? (4 marks)

1. newtons first law is the law of inertia

2. a performer will remain still or move in a constant velocity unless a force is applied

3. force is applied by the muscles

4. after a counter force is applied, the performer will continue in a current state of previous force applied until a new one is

5. Eg, swimmer will have to apply another breast stroke to overcome drag

what is newtons second law of motion?

law of acceleration

what is the acceleration equation?

force = mass x acceleration

what is meant by the law of acceleration

the more force applied to an object, the bigger the momentum produced will be

explain how Newtons second law applies to a Sprinter? (5 marks)

1. a performers mass remains constant

2. to accelerate a performer must generate a greater force

3. force is produced by muscular contractions

4. force produced is a ground reaction force

5. the greater the force, the greater the acceleration

what is newtons third law of motion?

law of action and reaction

what is meant by the law of reaction?

for every action there is an equal and opposite reaction

explain how the third law of motion applies to a sprinter? (5 marks)

1. newtons third law is the law of reaction

2. this means that for every action, there is an equal and opposite reaction

3. a sprinter would produce a force into the ground or into the start block

4. the ground or start block would apply an equal and opposite reaction back into the athlete

5. this means the larger the force applied into the ground, the more acceleration experienced