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Transcript
Forces/ Newton's Laws Quiz Study Guide This quiz will describe different scenarios involving Newton's Laws and ask you to identify which law goes with that type of motion. You should be able to justify your reasoning for your choices. Review with your notes and HW sheets from binder pages 113- Newton's Laws Notes, 114-115 Newton's Laws/ Motion Matching Worksheet, pg. 116 Momentum Notes, pg. 117, 118 Section 2-4 Review, Momentum and Centripetal force: Lesson Slide notes are on my website What to know: What is a force? Describe gravity and friction as forces. What is gravity, which direction does it act in? What is friction, which direction does it act in? 1) Newton's First Law: Law of Inertia Objects in motion will stay in motion, objects at rest will stay at rest, unless acted upon by an unbalanced force Ex: Be able to explain how Newton's first law is the reason why seat belts should be worn in moving car. 1) Use Newton's first Law to describe what is happening in this picture. Why won't a soccer ball start moving on its own? What has to happen in order for the ball to start moving? 2) Newton's Second Law: Force = Mass x Acceleration ( The relationship between force, mass , and acceleration) What are two ways to cause an object to accelerate faster? Ex: You are trying to push with shopping cart full of groceries, according to Newton's second law what are two things you could do to get the shopping cart to accelerate (speed up) Why do objects with less mass accelerate faster than objects with more mass? Newton's Third Law: Every action has an equal and opposite reaction Be able to identify action and reaction forces Draw and label the action and reaction forces on diagrams below, explain what is happening according to Newton's 3rd Law of Motion. Fig. 2 Book on the table Fig. 1 Person riding on a skate board Fig. 3 Children on a seesaw Momentum: Momentum = Mass x Velocity What happens to momentum when the mass is increased? What happens to momentum when the Velocity increases? -What is the Law of Conservation of Momentum- Which of Newton's Laws does this correlate with? -Define Centripetal force and in which direction does it act in? Draw a diagram.