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SCIENCE Study Guide NAME___________________________ Miss Smith PERIOD _________ The Science 4th Quarter Exam is scheduled for April 27, 2011. The exam is cumulative and covers all forces and motion material since March 7. Be able to use these equations: Speed, Acceleration, Force: Where is there no friction? Describe how an object moves where there is no friction: What causes an object that is moving to stop moving? What is another name for unbalanced forces? What are the 3 Laws of Motion? List AND explain them When does an object accelerate? What is another name for balanced forces? List 6 safety features that MUST be built into cars to add safety: What does a horizontal line mean on a motion graph? What 2 factors does the change in an object’s motion depend on? What does a steep, straight line mean compared to a less steep, straight line on a motion graph? What happens to the speed of a cart when release height is changed? What kind of vehicles are the most safe? Describe WHY. Least safe? Describe WHY. PRACTICE PROBLEMS: 1. While driving down the road, you observe a bug striking the windshield of your car. Quite obviously, a case of Newton's _____ law of motion. The bug hit the windshield and the windshield hit the bug. Which of the two forces is greater: the force on the bug or the force on the windshield? 2. A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving with the same speed and in the same direction? 3. An engine can exert a force of 1,000 N. How fast can this engine accelerate: a) a 1,000-kg car? B) a 2,000 kg car? Be able to: •Recall and use motion equations •Recall Newton’s 3 Laws of Motion and use them to prove whether statements are valid or invalid. •Interpret motion graphs / Draw motion graphs. Things to Review: •Forces and Motion quizzes •ALL LABS •ALL NOTES •ALL VOCABULARY •Key Concepts •ALL EQUATIONS •Handouts Vocabulary: Many test questions are written assuming you know your vocabulary, so learn these words if you haven’t yet! Know the following definitions: Motion, Frame of Reference or reference point, Speed, Constant Speed, Velocity, Friction, Acceleration, Force, Gravity, Mass, Braking Distance, Zero Net Force, Non-Zero Net Force, Inertia, Net Force, Balanced Force, Unbalanced Force 1 of 1
