1) A cyclist gets on his bike. He pushes relatively hard on the pedal and begins his trip. Once he begins moving, he doesn't have to push quite so hard to move faster. For a while, he coasts without pedaling at a mostly constant speed before applying his hand brakes, which squeeze rubber pads against the tires' rims, and coming to a stop.

First, state or summarize Newton's first law of motion and explain how some aspect of this scenario illustrates the first law.

Second, state or summarize Newton's second law of motion and explain how some aspect of this scenario illustrates the second law.

Third, state or summarize Newton's third law of motion and explain how some aspect of this scenario illustrates the third law.

All three law's and Case related to the law's from the given scenario is explained in explanation section

Step-by-step explanation

# Newton's first law of motion-

Every body remain in state of rest or uniform motion unless and until a net external force is applied on it.

From the scenario given here-

(1.) Bike is in the state of rest and to change its state of rest cyclists had to apply net external force by pushing the pedal hard.

(2.) Once he begins moving, he doesn't have to push quite so hard to move faster because both bike and the cyclists are in the state of motion so very less net external force is needed to increase the speed.

(3.) For a while, he coasts without pedaling at a mostly constant speed, because the system is in uniform motion and according to first law it remains in the state of uniform motion unless external force is applied.

# Newton's Second law of motion-

The rate of change of momentum of the body is directly proportional to the applied force on the body.

Fron the scenario given here-

(1.) By pushing the pedal hard the cyclists applies force which changes the momentum of the bike.

(2.) By applying hand brakes cyclists applies force on the rims which changes the momentum of the moving bike to zero.

# Newton's third law of motion-

For every action there is an equal and opposite reaction.

Fron the scenario given here-

(1.) Cyclists applies force by hand brakes, which applies a force (action) on the rims and the rims also applies equal force(reaction) on the rubber pads but in opposite direction which squeeze rubber pads.