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Transcript
Force and Motion Review What is the distance traveled by this object? 6 + 4 + 3.5 = 13.5 Km What is the net force acting on the following object? • 12 + 8 – 4 = 16 N to the right Which of the following represents an inelastic collision? A B • A (inelastic collision: masses are combined) Which of the following is a scalar? • • • • • A. Velocity B. Acceleration C. 42 m/s to the right D. Speed E. D. Speed only give magnitude not direction What does the following graph represent? • Decreasing speed or deceleration Which Newtonian term is used to describe the following situation? • Inertia: Newton’s First Law of Motion A speedometer gives the driver what information? • • • • A. B. C. D. Average speed Instantaneous speed Average velocity Overall acceleration Instantaneous Speed What is the displacement in the following illustration? 1 lap = 400 meters • Zero Displacement: The runner finished where they started. What formula could be used to find the objects displacement? Which graph would represent the acceleration due to gravity alone? • B: Constant Acceleration 9.81 m/s2 Satellites like the ones used for GPS and our moon are subject to the force of gravity alone. These objects are said to be experiencing… • • • • A. B. C. D. Terminal Velocity Instantaneous Acceleration Free Fall Universal Law of Gravitation Free Fall What force is represented by the green arrow? • Normal Force Force is labeled in what unit of measure? • Newton's (N) The brown box in the second diagram is providing what type of force on the tennis ball? • Centripetal Force What (2) forces must be balanced to keep a satellite in orbit? • Inertia • Gravity Determine the cars average speed. • Speed = distance / time • 5 miles / .2 hrs = 25 mph What type of friction would the following object most likely experience? • Rolling Friction Why is the velocity of the (2) astronauts less than the velocity of the (1)? • Increase in mass. • Momentum = Mass x Velocity For an object to accelerate, it must experience… • • • • A. B. C. D. Balanced forces Unbalanced forces Gravity Terminal Velocity Unbalanced Forces A projectile is an object upon which the only force acting is gravity. • What is the shape that describes the motion of a projectile? Parabolic Motion / parabola What would happen to an individuals mass when moving from planet A to planet B? • The persons mass would not change. Mass is the amount of matter in an object. Which car (red, green, or blue) experiences the greatest acceleration? • The blue car has a greater acceleration. It is changing its velocity at a more drastic rate. Which two spheres will have the greatest gravitational pull? • A Which color car represents graph B? • The “Red” car is moving at a constant speed which is represented by graph B. What must be eliminated for the following illustration to work on Earth? • Air Resistance / Fluid Friction. What has the sky diver reached when the force of gravity equals the force of air resistance? • Terminal Velocity The following illustrations supports what law. • Law of Conservation of Momentum What is the action / reaction pair in the following illustration? • (action)Baseball pushes glove to the left. • (reaction)Glove pushes baseball to the right. In which direction would friction act on the following illustration? • To the west, friction opposes motion.