Name:____________________ Date:_____________

Physics 11 - Chapter 2 Velocity Review 1. A 400-m, 800-m, and 1600-m race are all run around the same 400-m oval track. The winning times for the

races were 50 s, 2 min, and 4 min 10 s respectively. Which of the following statements is true?

a. All runners have the same average velocity.

b. The 400-m runner has the greatest average velocity.

c. The 800-m runner has the greatest average velocity.

d. The 1600-m runner has the greatest average velocity.

e. All runners have the same average speed.

2. The slope of a position-time graph always represents

a. displacement d. change in velocity

b. distance e. acceleration

c. velocity

3. 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.

e. The object travels a greater distance in the first segment than in the last segment.

4. The position-time graph that represents "uniform motion" is

a. A d. D

b. B e. E

c. C

5. The velocity-time graph that represents "uniform motion" is

a. A d. D

b. B e. E

c. C

6. Which of the following speeds is the fastest?

a. 1.4 105 m/h d. 4.2 10

–2 km/s

b. 1.4 102 km/h e. 4.0 10

3 cm/s

c. 40 m/s

Study the velocity-time graph pictured below and match each segment of the graph with the description of its

motion at that time.

a. segment A d. segment D

b. segment B e. segment E

c. segment C

____ 7. The object is motionless during this segment.

____ 8. The object is moving with constant velocity during this segment.

____ 9. The object travels the greatest distance during this segment.

____ 10. The object is experiencing non-uniform acceleration during this segment.

____ 11. The object is travelling north but accelerating south during this segment.

12. A jogger runs 6.0 km [E], then 4.0 km [N], and finally 2.0 km [W]. The entire trip takes 2.0 h to complete.

Calculate the jogger's

(a) average speed

(b) average velocity

13. A group of hikers sets out from point A, proceeds to B, then to C, and finally to D. The entire trip takes 6.0 h.

(a) Determine the hikers' average speed for the trip.

(b) What is the hikers' final displacement relative to their initial position?

(c) If the hikers release a homing pigeon upon their arrival at point D and the bird returns to point A 30 min

later, what is the bird's average velocity during the flight?

14. A physics recording timer makes 75 dots in 2.5 seconds. What are its frequency and period?

15. A large pendulum swings and completes 15 full swings in 20 minutes. What are its frequency and

period?

16. A machine gun fires 100 bullets per minute and they travel at 400 km/h. Find the period of the

machine gun’s bullet production and use it to find the distance between each successive bullet

fired.

17. A car travels 50 km/h for 30 minutes and then 80 km/h for 2 hours. What is the average velocity in

km/h? m/s?

18. A Voodoo aircraft can travel approx 1600 km/h at its fastest. Once caught 1000 km inside enemy

territory, a particular Voodoo pilot has 40 minutes to escape before being fired upon. Does he

make it?

19. A car starts out from Chilliwack (Ford Escort) and heads toward Vancouver at 110 km/h at the same

time a Jeep starts out from Vancouver and heads toward Chilliwack at 80 km/h. The distance

between Chilliwack and Vancouver is 90 km. At what distance from Vancouver do the Escort and

the Jeep meet?

20. A Turtle’s Adventure at the Equator

Note: positive = North, negative= South

Graph of Distance vs Time for Turtle Walking Along Equator

(a) What is the turtle’s displacement at

t = 0.0s t = 2.5s t = 7.0s

t = 10.0s t = 11.0s

(b) What is the turtle’s distance from the equator at these same times?

(c) What total distance has the turtle traveled at each of the above times?

(d) Calculate the turtle’s average speed and average velocity from

t = 0.0s to t = 7.0s and t = 11.0 s.

(e) Using tangent lines, determine the turtle’s velocity and speed at ( show calculations)

t = 2.0s, t = 10.0s

21. Match the following graphs with the descriptions below. (1 mark each)

Time (s)

0 1.0

2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0

Dis

tan

ce (

cm)

-6.0

-4.0

-2.0

0.0

2.0

4.0

6.0

8.0

(a) (b) (c) d(m) d(m) d(m)

t(s) t(s) t(s)

_____This object’s speed decreased to zero, then increased again as the object returned to its starting point.

____ This object traveled at constant speed, then stopped for a while, then returned to its starting point at a

constant speed.

____ This object traveled at a constant speed, then moved back and forth twice always at a constant speed.

22. Consider the following p-time graph

a) What is the position of the object at t = 5 seconds?

b) What is the displacement of the object between t = 0 and t = 11 s?

c) What is the displacement of the object between t = 5 s and t = 16 s?

d) What is the displacement of the object over the full twenty seconds?

e) What is the distance covered by the object over the full twenty seconds?

f) What is the average velocity of the object over the full twenty seconds?

g) What is the average speed (remember the definition for average speed) of the

object over the full twenty seconds?

h) What is the instantaneous velocity at t = 4 s?

i) What is the instantaneous velocity at t = 14 s?