ExamView Pro - kinematics3.tst

Name: ________________________ Class: ___________________ Date: February 24, 2006ID: AKinematics Test - Physics 11Multiple ChoiceIdentify the letter of the choice that best completes the statement or answers the question.____________1. Brett Favre throws a football to his receiver 42 meters downfield. If it takes 1.2 seconds to reach the receiver,how fast is the football traveling in meters per second?a. 50b. 35c. 29d. 0.292. The total length of a journey from start to finish with no regard to direction is called:a. distance.b. displacement.c. position.d. velocity.3. The position-time graph pictured below represents a race between three contestants A, B, and C. The racebegins at time zero at the sound of the starter's pistol. Which of the following statements is true?____a. The runner who started last finished first.b. The fastest runner won the race.c. The runner with a head start won the race.d. All runners had the same speed.4. Study the position-time graph pictured below and select the statement that is true.a. The object accelerates, stops, then accelerates in the opposite direction.b. The object's speed is greatest during the first segment.c. The object's acceleration is greatest during the last segment.d. The object's average velocity is zero.1 of 4

Name: ________________________ID: A____5. Consider the following velocity-time graph and select the statement that is true.____a. The object returns to its original position.b. The object is accelerating throughout the entire recorded time.c. The object speeds up and later slows down.d. The object moves forward and then backward.6. The position-time graph below depicts the motions of two objects, A and B. Which of the followingstatements concerning the objects' motions is NOT true?________a. The two objects travel the same distance.b. The two objects have the same velocity.c. The two objects have the same speed.d. The two objects travel for the same amount of time.7. Convert 125 km/h into m/sa. 34.7 m/s c. 2080 m/sb. 450 m/s d. 125000 m/s8. The motion of an object is shown in the following position-time graph. What is the objects speed?d (m)9876543211 2 3 4 5 6 7 8 9 10 11 t (s)a. 0.5 m/s c. 1.3 m/sb. 0.8 m/s d. 2 m/s2 of 4

Name: ________________________ID: A____9. The motion of an object is shown in the following velocity-time graph. What distance does the object travelduring the 10 s?v (m/s)76543211 2 3 4 5 6 7 8 9 10 11 t (s)a. 0.7 m c. 35 mb. 1.4 m d. 70 m40d(m)30201001.0 3.0 5.0t(s)Figure 1____ 10. In Figure 1, what is the average velocity from 0 to 4.0 s?a. 0 c. 20 m/sb. 10 m/s d. -40 m/s____ 11. In Figure 1, what is the velocity at t=5.5 s?a. 0 c. 20 m/sb. 10 m/s d. -40 m/s____ 12. If the position vs time graph of an object is a horizontal line, the object isa. moving with a constant non-zero speed.b. moving with constant non-zero acceleration.c. at rest.d. moving with infinite speed.3 of 4

Name: ________________________ID: A____ 13. The slope of a tangent line at a point on a position-time graph representsa. the objects positionb. the object’s instantaneous velocity at that timec. the object’s average velocity up to that point in timed. the object’s acceleration at that timeProblem14. Answer the following questions on the velocity-time graph below.86v (m/s)421 2 3 4t (s)a. When is the object speeding up? [1.5]b. When is the object slowing down? [1.5]c. What is the velocity at 3.5 s? [1]d. How far did the object travel in the first 2.0 s? [3]e. What is the object’s average speed for the first 2.0 s? [1]f. When is the object moving forward? [1]15. Describe what is happening (to position and velocity) in each of the following graphs. [4]d d v vt t t t16. Draw position-time and velocity-time graphs for the following situation: A person walks forward at a constantspeed, stops for a short time, then returns back to his starting point at a constant speed. [4]17. Slimy the slug is travelling to meet his sister Slurpy. He travels 25 cm/s for the first 3.0 m, 42 cm/s for thenext 1.5 m, and 12 cm/s for the last 4.0 m. What was Slimy’s average speed for the entire trip? [6]18. A police car travelling at 90.0 km/h is 350.0 m behind a car that is travelling at 70.0 km/h. How far does thepolice car travel before he catches up to the car in front of him? [4]4 of 4

ID: AKinematics Test - Physics 11Answer SectionMULTIPLE CHOICE1. ANS: B DIF: basic2. ANS: A DIF: basic3. ANS: C4. ANS: D5. ANS: C6. ANS: B7. ANS: A8. ANS: A9. ANS: C10. ANS: B11. ANS: D12. ANS: C13. ANS: BPROBLEM14. ANS:a) between 0 and 1.0 s, and between 3.0 and 4.0 sb)between 2.0 and 2.5 sc) 3 m/sd) d = 0.5(1)(3) + (1)(3)d = 4.5 me) v = d tv = 4.52v = 2.25 m / sf) The object is moving forward the whole time.15. ANS:a) Moving forward, constant speedb) Moving forward, increasing speedc) Moving forward, constant speedd) Moving forward, slowing down1 of 3

ID: A18. ANS:The relative velocity isv rel= 90.0 − 70.0v rel= 20.0 km/ hv rel= d ttt = d tv reld p= v ptd p= (90.0)(0.175)d p= 1.58 kmt = 0.350020.0t = 0.0175 h3 of 3