Name: 
 

Physics 12 - Chapter 1 Quiz


True/False
Indicate whether the sentence or statement is true or false.
 

1. 
You toss a ball vertically and step aside. The ball rises and then falls down along the same path and hits the ground. Since the ball reverses direction, it undergoes two-dimensional motion.
 

2. 
The magnitude of the velocity of that same ball just before landing is greater than its magnitude of initial velocity upon leaving your hand.
 

3. 
The acceleration of that ball at the top of the flight is zero.
 

4. 
The time for that ball to rise equals the time for it to fall.
 

5. 
A jogger running four laps around a circular track at 4.5 m/s undergoes motion with constant velocity.
 

6. 
The slope of the tangent to a curved line on a position-time graph gives the instantaneous velocity.
 

7. 
Megametres per hour per day is a possible unit of acceleration.
 

8. 
The magnitude of the acceleration due to gravity at Miami is greater than that at St. John’s, Newfoundland.
 

9. 
The quadratic formula must be used to solve problems involving the quadratic equation
vf2 = vi2 + 2ap12ch1_files/i0100000.jpgd.
 

10. 
A model rocket launched in a vacuum chamber at an angle of 45° above the horizontal, undergoes projectile motion.
 

11. 
If p12ch1_files/i0120000.jpgAB = 8.5 m/s [E], then p12ch1_files/i0120001.jpgBA = –8.5 m/s [W].
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 
 
For questions 12 to 15, refer to Figure 1:

p12ch1_files/i0140000.jpg
Figure 1
 

12. 
You toss a ball vertically upward from your hand: the initial position is your hand, and +y is upward. Of the position-time graphs shown in Figure 1, which best represents the relationship?
a.
a
b.
b
c.
c
d.
d
e.
e
 

13. 
You drop a rubber stopper from your hand: the initial position is your hand, and +y is upward. Which graph in Figure 1 best represents the relationship?
a.
a
b.
b
c.
c
d.
d
e.
e
 

14. 
You toss a ball directly upward: the initial position is your hand, and +y is downward. Which graph in Figure 1 best represents the relationship?
a.
a
b.
b
c.
c
d.
d
e.
e
 

15. 
You release a cart from rest at the top of a ramp: the initial position is at the top of the ramp, and +y is up the ramp. Which graph in Figure 1 best represents the relationship?
a.
a
b.
b
c.
c
d.
d
e.
e
 

16. 
A car with an initial velocity of 25 m/s [E] experiences an average acceleration of 2.5 m/s2 [W] for 2.0 ´ 101 s. At the end of this interval, the velocity is
a.
5.0 ´ 101 m/s [W]
b.
0.0 m/s
c.
25 m/s [W]
d.
75 m/s [W]
e.
75 m/s [E]
 

17. 
An acceleration has an eastward component of 2.5 m/s2 and a northward component of 6.2 m/s2. The direction of the acceleration is
a.
[40° E of N]
b.
[50° E of N]
c.
[24° E of N]
d.
[68° E of N]
e.
[68° N of E]
 

18. 
You are a fullback running with an initial velocity of 7.2 m/s [N]. You swerve to avoid a tackle, and after 2.0 s are moving at 7.2 m/s [W]. Your average acceleration over the time interval is
a.
0 m/s2
b.
5.1 m/s2 [45° N of W]
c.
1.0 ´ 101 m/s2 [45° N of W]
d.
3.6 m/s2 [S]
e.
5.1 m/s2 [45° W of S]
 

19. 
A tennis ball is thrown into the air with an initial velocity that has a horizontal component of 5.5 m/s and a vertical component of 3.7 m/s [up]. If air resistance is negligible, the speed of the ball at the top of the trajectory is
a.
zero
b.
3.7 m/s
c.
5.5 m/s
d.
6.6 m/s
e.
9.2 m/s
 



 
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