Grade 11 Physics
Published: October 4, 2021
Due: October 11, 2021
Late submissions will be penalized
Chapter 1: Motion in 1D
Marks: 100
Assignment 1 (Formal Task)
MULTIPLE CHOICE
In the space provided, write the letter of the term or phrase that best completes
each statement or best answers each question.
_____ 1. Which of the following is the equation for average velocity?
x
a. vavg
c. vavg xt
t
v v f
t
b. vavg
d. vavg i
2
x
Use
the graph below to answer questions 24.
_____ 2. During which interval is the cat at rest?
a. 0.05.0 s
c. 10.015.0 s
b. 5.010.0 s
d. 15.020.0 s
_____ 3. The cat has the fastest speed during which interval?
a. 0.05.0 s
c. 10.015.0 s
b. 5.010.0 s
d. 15.020.0 s
_____ 4. During which interval does the cat have the greatest positive velocity?
a. 0.05.0 s
c. 10.015.0 s
b. 5.010.0 s
d. 15.020.0 s
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5. Which of the following is the equation for acceleration?
t
a. a
c. a = vt
v
vi v f
v
b. a
d. a
ti t f
t
_____ 6. When a car’s velocity is negative and its acceleration is negative, what
is happening to the car’s motion?
a. The car slows down.
b. The car speeds up.
c. The car travels at constant speed.
d. The car remains at rest.
_____ 7. What does the graph on the right
illustrate about acceleration?
a. The acceleration varies.
b. The acceleration is zero.
c. The acceleration is constant.
d. The acceleration increases then
becomes constant.
_____ 8. In the graph on the right, how does
the acceleration at A compare with
the acceleration at B?
a. The acceleration at A is positive
and less than the acceleration
at B.
b. The acceleration at B is positive
and less than the acceleration at A.
c. The accelerations at A and B are each zero.
d. The accelerations at A and B cannot be determined.
_____ 9. Which of the following line segments on a velocity versus time graph
is physically impossible?
a. horizontal line
b. straight line with positive slope
c. straight line with negative slope
d. vertical line
_____ 10. In the graph at the right, at what
point is the speed of the ball
equal to its speed at B?
a. A
b. C
c. D
d. none of the above
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_____ 11. A baseball catcher throws a ball vertically upward and catches it in the
same spot as it returns to the mitt. At what point in the ball’s path does
it experience zero velocity and nonzero acceleration at the same time?
a. midway on the way up
b. at the top of its path
c. the instant it leaves the catcher’s hand
d. the instant before it arrives in the catcher’s mitt
SHORT ANSWER
12. Distinguish between the displacement of a traveler who takes a train from New
York to Boston and the displacement of a traveler who flies from Boston to New
York. Be sure to compare the magnitudes of the displacements.
_________________________________________________________________
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13. If a runner moves from a positive position to a negative position, explain if the
runner’s displacement is negative or positive.
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14. Explain how a dog that has moved can have a displacement of zero.
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15. Why is the direction of free-fall acceleration negative when the direction away
from the earth is taken as positive?
_________________________________________________________________
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PROBLEM (Marks will be deducted if working is not shown)
16. A biker travels at an average speed of 18 km/h along a 0.30-km straight segment
of a bike path. How much time does the biker take to travel this segment?
17. A hiker travels south along a straight path for 1.5 h with an average speed of 0.75
km/h and then travels north for 2.5 h with an average speed of 0.90 km/h. What is
the hiker’s displacement for the total trip?
18. A skater glides off a frozen pond onto a patch of ground at a speed of 1.8 m/s.
Here she is slowed at a constant rate of 3.00 m/s2. How fast is the skater moving
when she has slid 0.37 m across the ground?
19. Human reaction time is usually about 0.20 s. If your lab partner holds a ruler
between your finger and thumb and releases it without warning, how far can you
expect the ruler to fall before you catch it? (Disregard air resistance.
a = g = 9.81 m/s2.)
20. A pair of glasses are dropped from the top of a 32.0 m high stadium. A pen is
dropped 2.00 s later. How high above the ground is the pen when the glasses hit
the ground? (Disregard air resistance. a = g = 9.81 m/s2.)
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