PHYSICS 2020 YEAR END REVIEW Motion Graphs Distance vs Time Graph Describe the direction and type of motion at… 1. A to B= 2. B to C= 3. C to D= 4. E to F= 5. Calculate the velocity from A to B. Velocity vs Time Graph 6. Calculate the acceleration at A. 7. Calculate the acceleration at B. 8. Calculate the distance over part A of the graph. 9. Calculate the distance over part B of the graph. Consider the position vs. time graph below for cyclists A and B. 10.Do the cyclists start at the same point? 11.At t= 7s, which cyclist is ahead? 12.Which cyclist is traveling faster at t = 3s? 13.Are their velocities equal at any time? 14.What is happening at the intersection of lines A and B? 15.Which graph of v versus t best describes the motion of a particle whose velocity is constant and negative? 16.In which graph of v versus t does the particle end up farthest from its starting point? 17.Which graph of v versus t best describes the motion of a particle with positive velocity and negative acceleration? 18.Which graph of v versus t best describes the motion of a particle with negative velocity and negative acceleration? 19.In which graph of v versus t is the magnitude of the particle's acceleration the greatest? Velocity & Acceleration 20.If a cross-country runner covers a distance of 347 meters in 134 seconds what is her speed? 21. A child sleds down a hill with an acceleration of 2.82 m/s2. If her initial speed is 0.0 m/s and her final speed is 15.5 m/s, how long does it take her to travel from the top of the hill to the bottom? 22.A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak. (Hint: the time to rise to the peak is one-half the total hang-time.) !"# $%&'()*&+,-&./01-,2&3-42-3&.256&2,3-&4%7&2,481,3&4&39,,7&5.&"":&6;3&/%&!& 3,85%73#&<5=&6>81&7/3-4%8,&7/7&-1,&+,-&85?,2&/%&-1,&!&3,85%[email protected]& 24.The car in the picture above is slowing down. a) The distance is (Positive, Negative, Zero)? b) The velocity is (Positive, Negative, Zero)? c) The acceleration is (Positive, Negative, Zero)? 25.The car in the picture above is slowing down. a) The distance is (Positive, Negative, Zero)? b) The velocity is (Positive, Negative, Zero)? c) The acceleration is (Positive, Negative, Zero)? Forces 26.Rank these boxes in order from greatest net force to smallest. Negative and positives are not a factor. (The masses of the boxes are the same) 27.A car having a mass of 500 kg is initially traveling with a speed of 10 m/s. The car has a constant acceleration while braking. It takes 4 seconds to come to a stop. What is the net force on the car while it's braking? 28.A large 50 kg crate is at rest on level ground. Two people push on the crate. One pushes with 200 N while the other pushes with -50 N. Find the acceleration for the crate. 200 N 50 N 50 kg 29.A 10 kg mass moves along with an initial velocity of 4m/s. A force of 20 N is applied for 2s. Find the final velocity. Vi = 4 m/s t = 2 sec 20-N 10 Kg 30.A boat heads directly across a river with a velocity of 12 m/s. If the river flows at 6.0 m/s find the magnitude and direction (with respect to the shore) of the boat's resultant velocity. Riverʼs V = 6 m/s Boatʼs V = 12 m/s 31.Mr Arnold flies a plane. Calculate the Net Force on the plane. It will be a right triangle. Find the Resultant and the Angle. X Y F1= F2= F3= F4= F total R= _______ !=_______ 32.Mr Arnold skis down the slope. He skis down a 25o slope. Calculate the following things. m=85kg W=_________ P=__________ friction = 30 N m= 85-Kg =_________ N=_________ Friction =-30N Fnet =______ a=_________ 33.Mr. Arnold pushes a 100Kg block of ice with a force of 200N at 25o below X. Calculate the following information. m=100Kg W=_________ P=__________ parrallel N =_________ N=________ Friction = -25N Fnet =______ a=_________ 25 degrees 200N friction W Friction 34.A car has a mass of 1020 Kg and has a coefficient of friction between the ground and its tires of .85. A. What is the force of friction? 35.Solve for all of the blanks in this picture. & 36.A block weighing 80 N rests on a plane inclined at 20° to the horizontal. the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.15, What is the force F, parallel to the plane, that will cause the bock to side up the plane at a constant velocity? (Hint: equal and opposite to Friction + P) Torque 37. Calculate the missing Force. 38.A bricklayer weighing 800 N stands 1.0 m from one end of a scaffold 3.0 m long. The scaffold weighs 750 N. A pile of bricks weighing 320 N is 1.0 m from the other end of the scaffold. What force must be exerted on each end of the scaffold to support it? 39.A beam is attached to a wall by means of a hinge. Various weights are placed on the beam. A rope also helps to support this beam as shown in the diagram. What is the tension in the rope? 45 o CG X Energy Problems If a 20-Kg Roller coaster if traveling at 5 m/s at point A. 100-N 20-N 50-N Calculate the following… 40. Velocity @ C KE + PE + W = + PE 41. Height @ D if the coaster is traveling @ 42m/s KE + PE + W = KE + PE Static Electricity 42. 43. Series Circuit 44.What is the current on A,B and C? 45.What is the voltage on A, B and C? 46.What is the resistance on C? 47.What is the total resistance? 48. What is total current? KE Parallel circuits 49.Total Resistance =__________ 50.Total Voltage =__________ 51.Total Current=__________ 52.Voltage on A, B, C, & D 53.Current on A, B, C, & D Combined Circuit 54. Projectile motion 55.A soccer ball is kicked horizontally off a 36.0-meter high hill and lands a distance of 40.0 meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball. ?=v 36m 40 m 56. A golfer strikes a tee shot at 75 m/s with an angle of 32° above the horizontal. Assuming the golf hole is level, calculate the horizontal distance the ball will travel. Waves An automobile is traveling away from Jill and towards Jack. 57.Towards which person do the sound waves travel the fastest? a. Jack b. Jill c. Both the same. 58.Who will hear the highest frequency? a. Jack b. Jill c. Both the same. 59.Diagram A shows a ____ pulse and diagram B shows a ____ pulse. a. longitudinal, transverse b. transverse, longitudinal 60.The wavelength of the wave in the diagram below is given by letter ______ and the amplitude of the wave in the diagram below is given by letter _____. Momentum 61.A 3000 kg truck traveling -10.0 m/s collides with a sports car stopped at a light with out the breaks on (the collision is elastic) If the truck is still moving at -5 m/s after the collision. What is the velocity of the car immediately following the collision? 5000 kg 1500 kg 0 m/s 10.0 m/s 62.A 1500 kg car is moving 40o north of east at 20 m/s collides with a 5000 kg truck moving at -10 m/s. If the car is traveling 10 m/s 35o north of west, what is the trucks motion? BEFORE 5000 kg 10.0 m/s 20 m/s 1500 kg 40 o After 10 m/s 35 o ?