Newton’s LawsJoe, Gwen, Sarita, and Tommy

GROUP EXPERIMENT

-MARBLES-

Materials• Stopwatch• Marbles• Track for marbles• Ruler or meter stick

Procedure• Weigh the marbles to find mass• Measure the track• Line up the marbles touching each other on the

track• Bring the end marble to the end of the track and

push it into the line• Start the stopwatch when you push the marble

and stop it when the last marble falls ff the track• Record the results• Repeat steps 3-6 changing how hard you push the

marble every time• Find the acceleration of each trial and compare

how it changes when you change the force you apply

Calculations• These calculations are needed to find

acceleration and force:–Distance/time=speed–Speed + direction=velocity–Final velocity-initial

velocity/time=acceleration–Mass x acceleration=force

Newton’s 1st Law• Newton’s 1st law – An object in motion

will stay in motion and an object at rest will stay at rest unless acted upon by unbalanced forces.

• This lab relates to Newton’s 1st law because when you push the marble, it would keep going, but because it hits another marble, it is acted on by an unbalanced force and stops moving.

Newton’s 2nd Law• Newton’s 2nd Law – When you increase the

force of an object the acceleration increases, and when you increase mass the acceleration decreases. (inertia)

• Newton’s 2nd law relates to this experiment because the acceleration increased when we used more force to push the marble. If we would’ve changed the size of the marbles as well, the acceleration would’ve decreased.

Newton’s 3rd Law

• Newton’s 3rd law – Every action has an equal and opposite reaction

• This law relates to our lab because when the marble hits another marble, the momentum travels through the line and makes the opposite marble come off the end.