) 6 A car s motion with respect to the ground is described by the following. / ++L dfve fw-vj4 cthivi. Kinematics. h y-oura,, tt&t-fo Er- 1V.

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1 Friction Centripetal force and acceleration Circular/Rotational Motion Newton s Third Law (Paired forces) Weight on an Elevator ) 6 A car s motion with respect to the ground is described by the following function: diagrams for each. an example in which an object with positive acceleration is slowing downe able to draw graphs and motion 5. ive an example in which an object has gtive accelerafipri and is tk vietñi - 4t&chn 4. The position-vs-time graph for a moving object is a straight line with a slope 1 -l vistzt VcJ equal to m/s. Explain what this means about the motion of the object. / ++L dfve fw-vj4 cthivi displacement and path ngth? i td rqpvsqv1t te CfvVtfc of tnti t obt r wvc f model to describe the motion of a real object. 2. Describe the point-like model of a real object. Explain why we can use this 3. What is the difference between initial position, final position, h i h y-oura,, tt&t-fo Er- 1V. zjd -t4t m. o%t- ov t-- W ci us - cde wlvt tie.. 1. Are you moving while sitting on a train that is leaving the station? displacement, and acceleration. c) Interpret x vs t and v vs t graphs in terms of position, velocity, b) Determine the direction of acceleration using a motion diagram. a) Draw a motion diagram for a moving object Make sure you know how to: Kinematics guide. are not meant to be all-inclusive or 100% representational of the midterm exam, it Is merely a You should look over old tests, labs, homework and study guides. Questions on This study guide Physics Midterm Review

2 given in the table below. speed over a period of 10 seconds. The data he includes in his report is 7. While driving along a flat stretch on the highway, there is a policen4an O 2 CDetermine thid vocity ime o.a s, parked behind a bush. As you drive by he uses his speed gun to track your acceleration. At what time hf any) does the car s velocity become zero? 4/ the trip?,ysics Midterm Review X - the airplane. Ignore air resistance. (), - They pick their new favorite song, Ring of tire by Johnny Cash, and get into C I irix. /lot ç k!,lct 2 (] /)(Ics) -: 1ao3O5I3 d) What will their final velocity be right before reaching ground? a) Sketch the situation () j from in order to finish the song right before reaching the ground? c) If Ring of Fire i mm 36 sec Ion t what altitude do they have to fall b) Draw a motion ci ra 10.Ashleigh and Rachael are bored with attending choral lessons inside the high school and decide instead to practice. their singing while skydiving. the ball at the maximum height of the flight? (j?p4) long will it take to come back to the ground? What is te acceleration of 9. If you throw a tennis ball straight up in the air with a velocity of 30m/s, how ee poe c) What is the car s average velocity during the whole trip? a) What is the car s rate of acceleration during the 1st 10 seconds? for the following hour. After that hour it brakes to a stop in 15 seconds.. b) What is the total distance (in meters) that the car travels during 8. A car goes from rest to 100 km/hr in 10 seconds. It then travels at that rate io (125 _ 6 t(94 ) 2 ) 76 c) What is the equation of the graph? 4 78 of the car after 8 seconds. 8 11O8> show? (mph) b) What type of relationship does the graph Time (s) Velocity a) Plot a velocity vs time graph.. (,> cj d) Using the graph, determine the displacement

3 : a) Sketch the situation. 2 rn/s nd she accelerates at a rate o rn/s t 3 4 s ntil she shoots the ca es a pass and has a breakaway pos the de nse Her initial speed is 1. Kelsey is playing in a lacrosse game against North s rival South. She 18. Draw all of the forces for the following rocks. also sitting on a platform scale. The platform scale reads about 36 units of reports Eugenia says that it reads the weight of a person, Alan says that it car s tires and the road. and the floor, a volleyball player and the volleyball, and a speeding up 17 Identify third law force pairs for the following interactions A rollerbioder force and the spring scale reads about 28 units of force. What is the Lperson Who do you think is correct? Why? çand Mike says that the scale reads the force that the scalêexertsoh the elevator compare to the magnitude of the downward force exerted y reads the sum of the forces exerted on the person by Earth and the scale, 14. Why do you need to eep pushing a grocery cart in a store in order to 15 An elevator in a tall office buiniing moves downward at constant speed 16 Three friends are arguing about the type of information a bathroom scale Earth on the elevator? Explain your reasoning a-.csz How does the magnitude of the upward force exerted by the cable on the magnitude of the force that Earth exerts on the bag? keep it moving? L& book bag is partially supported while hanging from a spnng scale and :i: 12 You slide toward the right at decreasing speed on a horizontal wooden ) j floor Choose yourself as the system and list external objects that interact with and exert forces on you r c) Understand and apply Newton s First, Second, and Third Laws to word problems. graphs with dynamics concepts. b) Correlate verbairepresentations of motion. motion diagrams and motion diagram to apply Newto&s second law. a) Identify a system 1 construct a force diagram for it, and use the force. Make sure you know how to: Forces and Newton s Laws i a t (s)(3(&+ (r(s)(3 5) d) How far did she run while accelerating c) How fast is she going when she releases the ball? I + b) Draw a motion diagram Physics Midterm Review

4 horizontal direction S e. How long does it take them to rea the parking lot? Make sure you know which component of velocity determines time, which a) How long (in seconds) does the ball take to hit the ground? 22.A boy on a 250 m high tower throws a ball that lands 100 m away in the Michelle is standing, what is the height of the bridge? B) If the stone had car be in relation to the pit when it lands? situation. C) if the car continues to travel at the same speed, where will th c. Solve for any of the forces that you can. -ç \ i b. Draw and label a force diagram for the object of interdt a. Sketch the situation, circle the object of interest dropping point will the pit hit the ground? B) Draw a picture of the traveling down the road at 18 rn/s. a) How far, horizontally, from the initial component is constant, and which component is accelerating. (e ) () f two of his strong physics friends, Sam and Tim, to help him move the car. d. What is the acceleration of the car? P4 Two Dimensional Motion ç 6) 21.Jake drops a cherry pit out the car window 1.0 m above the ground while been kicked harder, how would this affect the time it would take to fall? and it lands in the water with a horizontal distance of 5.40 m from where Alex s car the Amwell Road parking lot. Alex gefs ) The 3 students push horizontally with a force of 500 N each.e no acceleration moving at constant speed moving in a circle around post 20. Michelle stands on the Millstone River Bridge kicking stones into the water / below. A) If Michelle kicks a stone with a horizontal velocity of 3.50 mis, ysics Midterm Review

5 Physics Midterm Review Circular Motion b) What was the ball s initial velocity 23. Use your understanding of Newton s laws to explain why you tend to slides.. across the car seat when the car makes a sharp turn. / kw 4i 24. A 13 g holiday ornament is attached to a 0.93 m string. The stopper is swungin a horizontal circle making one revolution in Determine the for exerted by the string on the stopper k)netai b1iisung in a circle attached to meter ham. The 5all 1elmna rn/s a. Deter e the centripetal acceleration of the ball b. Determine how hard you need to pull on the chain to maintain this rotation. (a) av%