Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Equivalence principle wikipedia , lookup
Introduction to general relativity wikipedia , lookup
Coriolis force wikipedia , lookup
Lorentz force wikipedia , lookup
Fictitious force wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Centrifugal force wikipedia , lookup
Artificial gravity wikipedia , lookup
Centripetal force wikipedia , lookup
Do Now (12/7): •Make a list of concepts you need to know for your test tomorrow. Ms. Timson’s Physics Review to Conquer Forces and Newton’s Laws Rules of the Game • There will be tribes, as divided by the teacher • For each problem which appears on the slide, the tribe will be able to work together to vote on one answer given only the time which will be written on the slide. • Tribes cast their answer using their voting cards only in the time allowed. • Each team with a correct answer is allowed to cast one vote to remove another tribe from the island. The teacher will have each tribe cast their vote simultaneously by writing the color of the tribe they are voting for on their white board. The teacher will then remove tribes from the island. • The teacher will track which tribes are in and which tribes are out of the game with signs on the board. • If a tribe is voted out, they can reenter the game by answering the next question correctly to reenter. They will NOT receive a vote for that question but must wait until the next question. • Winning tribes will be those still on the island at the end of the game. • ***The teacher will be the final judge of any conflicts or confusions – and remember, be respectful and be honest! The acceleration of an object is ______ its mass. • a) directly proportional to the square of • b) inversely proportional to the square of • c) directly proportional to • d) inversely proportional to 20 seconds • When the net force acting on an object is zero, the object will stay at rest or at constant velocity. This statement corresponds to Newton's _____ law. a) 1st b) 2nd c) 3rd d) 4th 10 seconds 8N 5N • Calculate the net force a) 13N b) 3 N c) -13 N d) -3 N 30 seconds 8N 5N • Calculate the acceleration if the mass is 1.5 kg a) 3 m/s2 b) 2 m/s2 c) 4.5 m/s2 d) 1.5 m/s2 40 seconds 8N 8N This object is: a) accelerating b) In equilibrium c) unbalanced 40 seconds A ball is rolling to a stop on a pool table. What are the forces acting on the ball? a) Applied force, friction, gravity, normal force b) friction, gravity, normal force c) gravity, normal force d) Applied force, gravity, normal force 40 seconds • If you throw a bowling ball while standing on a skateboard, you will roll backwards. This statement corresponds to Newton's _____ law. a) 1st b) 2nd c) 3rd d) 4th 30 seconds • 41)When unbalanced forces act upon a object, the object will accelerate in the direction of the force. This statement corresponds to Newton's _____ law. a) 1st b) 2nd c) 3rd d) 4th 1 minute • If you’re standing (facing forward) on a forward-moving flat wagon that stops suddenly, you will: a) move backwards b) b) move forwards c) remain stationary with respect to the wagon 30 seconds The acceleration due to gravity: • a) is constant for all planets • b) varies slightly over the Earth's surface • c) is constant over the Earth's surface 10 seconds • • • • • The SI unit for acceleration is: a) Newton b) kgm/s2 c) m/s d) m/s2 10 seconds One Newton is equivalent to: a) 1 kgm/s2 b) b) 1 kgm2/s2 c) c) 1 m/s2 d) d) - 9.8 m/s2 15 seconds If a quarter & a feather were dropped in a vacuum (no air resistance): • a) the quarter reaches the bottom first • c) the feather reaches the bottom first • b) both reach the bottom at the same time • d) the quarter drops twice as fast as the feather 2 minutes • The net force that is required to give a mass of 60-kg an acceleration of 8 m/sec2 is ____ • A) 7.5 N • B) 9.8 N • C) 480 N • D) 950 N 1 minute vector representing the sum of two or more vectors is called the _______ . • A) addend • B) component • C) equilibrant • D) resultant •30 s If Fnet , the vector sum of all forces acting on an object, is not equal to zero then the object _____ . • A) has no inertia • B) has uniform velocity • C) is in equilibrium • D) will accelerate 20 seconds The slope of a position–time graph is equal to: A. The distance B. The position C. The acceleration D. The velocity 20 seconds • In a friction experiment, a horizontal force of 25 N was needed to keep a 15 kg object sliding at constant speed over a horizontal surface. – Calculate the coefficient of friction m. – What applied force is required to accelerate the object at 2.0 m/s2? 20 seconds Congratulations! Good luck tomorrow! I know you can conquer your test