* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download The Big Plot
Relativistic mechanics wikipedia , lookup
Coriolis force wikipedia , lookup
Center of mass wikipedia , lookup
Classical mechanics wikipedia , lookup
Equations of motion wikipedia , lookup
Newton's theorem of revolving orbits wikipedia , lookup
Jerk (physics) wikipedia , lookup
Fictitious force wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Centrifugal force wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Classical central-force problem wikipedia , lookup
Name:__________________ Block: ____ Date: ___/___/______ Review for Newton’s Law (focus on 2nd Law) Topic Covered: Forces and Interactions, Inertia and Force, F=ma, Friction, Forces Come in Pairs A) Quantities, units, and symbols 1) The quantity, its symbol, its standard international unit, and its unit’s symbol are represented in the following table. Fill the blanks by following the example. On the last column write a V if the quantity is vector and S if the quantity is a scalar. Note some units could correspond to more than one quantity. Quantity Symbol Unit Unit’s symbol V for vector or S for scalar force F Newton N V acceleration g v kilogram B) Newton’s Laws 2) A car is experiencing a 600 Newton force to the left. (This is the force that the tires and the road together produce.) The car is also experiencing a 200 Newton frictional force to the right. a. Draw a free-body diagram of the car. b. What is the net force acting on the car? Be sure to include direction. c. If the car has a mass of 800 kg, what is the acceleration of the car? Show your work! 3) Ms. Chen saw lots of snow piled on top of his car; she was feeling lazy so she didn’t clear the snow off the top. When she came to a sudden stop on a highway, all the snow pile moved onto the hood of his car and blocked his vision. Why? Use Newton’s Laws to Explain Your Answer. 4) When you are falling towards the Earth, is the Earth falling towards you? Why or Why not? 5) A 2 kg mass has an acceleration of 4 m/s2. What net force must be acting on it? SHOW YOUR WORK! 6) A 2 kg mass has a net force of 10 N acting on it. What is its acceleration? SHOW YOUR WORK! 7) A net force of 5 N causes an object to have an acceleration of 1 m/s2. What is the mass of the object? SHOW YOUR WORK! 8) When a car is turning the corner, what is the object that provides the net force making the car turn? What type force is that (gravity, spring, tension, friction, air resistance, normal)? Which direction is that net force? 9) Vector, Scalar! One of the three quantities listed here are two vectors? Which ones? Net Force Mass Acceleration 10) A 2000-kg truck is moving, and its motion is shown in the graph below. v (m/s) 50 40 30 20 10 0 t (s) 0 4 8 12 A. How much braking force is applied to the truck during the ten seconds shown? SHOW YOUR WORK! 11) Practice: Open-response MCAS Question BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION. Show all your work (diagrams, tables, or computations) If you do the work in your head, explain in writing how you did the work. The figure below is a graph of net force vs. the acceleration of an object. a. Use the graph to determine the mass of the object. Show your calculations and include units in your answer. b. What acceleration will the object have if the net force is 50 N and the trend shown by the graph continues? Show your calculations and include units in your answer. c. On the grid in your Student Answer Booklet, draw a graph of force vs. acceleration if the mass of the object is halved and the object is subjected to the same net forces. Label the axes on your graph and be sure to include units. Label this graph “c.” d. On the same axes that you used in part (c), draw a graph of force vs. acceleration if the mass of the object is doubled and the object is subjected to the same net forces. Label this graph “d.” 10