Newton’s Laws of Motion 10.01.12

Warm-up Choose a word in parentheses to complete the statements. If forces are in the same direction their magnitudes can be (added, subtracted). If forces are in the opposite direction their magnitudes can be (added, subtracted). If an object is accelerating or changing direction, then the forces are (balanced, unbalanced).

Learning target I can explain how inertia and momentum affect an object’s motion.

Four-square (inertia and momentum) Definitions Description Sketches Relationship

DoL Measure of how hard it is to stop an object. Air bags and seat belts help you from getting injured due to _____. p = (m)(v) A car traveling the same speed as a bicycle has more ______. Help to explain Newton’s Laws of Motion. For each of the statements: I inertia M momentum B both N neither

Warm-up Explain the differences between momentum and inertia. Use glossary if necessary

Learning target I can summarize Newton’s Laws of Motion.

Newton’s First Law of Motion Definition Explanation Balanced forces = no change in motion Unbalanced forces = change in speed or direction An object at rest will remain at rest An object in motion will remain in motion unless acted upon by an unbalanced force

Newton’s Second Law of Motion Definition Explanation Force = mass times acceleration F=ma More force to move a more massive object More force to accelerate an object more

Newton’s Third Law of Motion Definition Example Every action has an opposite and equal reaction Rowing a boat

DOL A runner moves up to the starting line. The starter fires the gun to begin the race and the runner takes off down the track. As she crosses the finish line, she begins to slow herself to a stop. Explain how all three of Newton’s Laws of Motion apply to this situation. Give specific examples.

Science Fair Brainstorming On notebook paper… What category are you interested in entering? Biology Health and Behavioral Science Physical Science Engineering/Mathematics/Computer Science Earth Science What ideas do you have for Science Fair? Testable question Potential topics Areas of interest

Warm-up Fill in the blank. __________ forces cause a change in motion while _________ forces do not. __________ is a measure of how difficult it is to stop an object. __________ is an object’s resistance to changes in its motion. __________ equals mass times velocity. Every __________ has an opposite and equal __________.

Learning Target I can explain how Newton’s Laws of Motion apply to various activities and moving objects.

Example Mountain Biking Newton’s First Law of Motion If forces are extremely unbalanced on the front wheel, then inertia will cause you to crash. Newton’s Second Law of Motion More force applied to the pedals results in quicker acceleration Newton’s Third Law of Motion The action of pulling on the brakes causes the reaction of the brakes being applied to the wheels.

Assignment Fold paper into quadrants. Choose an activity or object that involves motion. Sketch a diagram in the first quadrant showing your activity. In each of the next three quadrants, give a detailed explanation or specific example of how each of Newton’s Laws of Motion apply to the activity or object. Talk with four other students in class and take notes in each quadrant using the back of the paper.

DOL - matching NFLM NSLM NTLM Also known as the law of inertia Force equals mass times acceleration Every action as an opposite and equal reaction