Science 20F: Physics Exam Review
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Grade 10 Exam Review #3: PHYSICS
Name: ___________________
Date: _____________________
***Please remember to use significant figures in all your answers***
1. What does physics study?
2. What are the two categories of physics?
3. Alice walks 0.95 m/s for 2.0 hours. How many kilometers did she walk in
total? **check units**
4. Sally skates to school a total distance of 6.0 km. She has to slow down twice
to cross the street but overall the journey takes her 0.80 hours. What is
Sally’s average speed during the trip?
5. Jose rides his bicycle from his home to school. He travels 6.25 km in 0.550
hours. What is his average speed for the trip in m/s?
6. What is displacement?
7. How are displacement and velocity related?
8. What is the difference between a scalar and vector quantity?
9. What does the slope on a position time graph represent?
10. What is the difference between speed and velocity?
11. A person walks 4m [W], then 4m [S], then 4m [E] and finally 4m [N]. What is
the person’s displacement? What is the distance travelled?
12. Erica walks 4 meters North, then 2 meters South. This took her a total of
30 seconds.
a. What is her displacement?
b. What is the distance travelled?
c. What is her average velocity?
d. What is her average speed?
13. A cyclist starts at a position 150 m north of town and after 15 min ends at a
position 1100 m south of town.
a. What is the displacement of the cyclist?
b. What is the cyclist’s average velocity in m/s?
14. Draw position-time graphs for the following motions:
a. Zero velocity
b. Constant positive velocity
c. Constant negative velocity
d. Speeding up in a positive direction
e. Speeding up in a negative direction
f. Slowing down in a positive direction
g. Slowing down in a negative direction
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15. Use the picture below to answer the questions (do not worry about
significant figures):
Use the diagram to determine the distance and displacement of the skier: Use
[R] right and [L] left for vector quantities and consider the starting point A as
r
the origin or “0”. Calculate displacement using:
Route
d (m)
t (s)
Speed (m/s)
A through C
A through D
B to C
r
Δd = dfinal − dinitial .
r
Δd
(m) [ ]
A to B
r
t (s)
Velocity
(m/s) [ ]
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16. Consider the position time graph below. Any positions that are positive are
north, and any positions that are negative are south. (Do not worry about
significant figures)
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
q.
What is the position of the person at 40 seconds?
What is the position of the person at 20 seconds?
What is the distance from 0 - 10 seconds?
What is the displacement from 0 - 10 seconds?
What is the distance from 15 – 40 seconds?
What is the displacement from 15 – 40 seconds?
What is the distance from 0 – 30 seconds?
What is the displacement from 0 – 30 seconds?
What is the average speed from 0 - 10 seconds?
What is the average velocity from 0 - 10 seconds?
What is the average speed from 15 – 40 seconds?
What is the average velocity from 15 – 40 seconds?
What is the average speed from 0 – 30 seconds?
What is the average velocity from 0 – 30 seconds?
During which time interval(s) is the person stopped?
During which time interval(s) is the person moving north?
During which time interval(s) is the person moving north?
17. For the following position-time graphs, determine whether the object is
speeding up in the positive or negative direction or slowing down in the
positive or negative direction:
a.
b.
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18. What happens when the line crosses the X-axis on a velocity-time graph?
19. What does the slope on a velocity time graph represent?
20. Draw a velocity time graph that corresponds with the following statements:
a. Zero velocity
b. Constant positive velocity
c. Constant negative velocity
d. Speeding up in a positive direction
e. Speeding up in a negative direction
f. Slowing down in a positive direction
g. Slowing down in a negative direction
21. Consider the velocity-time graph below, positive velocity is north, and
negative velocity is south.
a) What is the velocity at 1 s?
b) What is the velocity at 7 s?
c) What is the acceleration from 6-8 s?
d) At what instant does the object have the greatest velocity?
e) At what point in time does the object turn around?
f) What is the displacement for the first 3 s?
g) What is the displacement from 6-9 s?
h) What is the displacement from 0-6 s?
i) What is the acceleration from 2 – 3 s?
j) What is the acceleration from 8 – 9 s?
k) During what interval(s) is the object at rest?
l) Where is the object slowing down in a negative direction?
m) During what time interval(s) is the object moving north?
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22. What is acceleration?
23. What are the units of measurement for acceleration?
24. In a road test, Car A accelerates from rest (0 m/s) to 42 m/s in 18 seconds.
Car B takes 11 seconds to do the same test. What is the average
acceleration of each car?
25. A cyclist increases her speed by 5.8 m/s in a time of 5 seconds. What is her
acceleration?
26. A car accelerates from rest to 13.9 m/s in 9.3 seconds.
a. What is the average acceleration of the car?
b. Using the acceleration from part A, how long would the car take to
accelerate from 11.1 m/s to 16.7 m/s?
27. A train is accelerating at a rate of 2 m/s2 for 7 s. If its initial speed is 20
m/s, calculate its final speed.
28. A roller coaster accelerates downhill at a constant rate of 6.0 m/s2. After
3.0 seconds it reaches the bottom of the hill and is traveling at a speed of
22 m/s. Calculate the speed of the roller coaster at the top of the hill.
29. When does a car have zero acceleration?
30. What are Newton’s three laws?
31. What is the relationship between velocity and the distance a passenger is
thrown during an accident?
32. A driver increases the speed of his car from 30 km/h to 90 km/h. He then
crashes and is thrown from the car. If he crashed at 30 km/h, he would have
been thrown 10 m. How far has been thrown at 90 km/h?
33. Use Newton’s first law to explain the following:
a. Why is an unrestrained passenger thrown from a vehicle during a
crash?
b. Why do you suffer from whiplash after being involved in a rear end
collision?
34. According to Newton’s second law what is the relationship between force
and mass?
35. If you double the force on an object and keep the mass the same, what
happens to its acceleration?
36. How are acceleration and mass related?
37. If you triple the mass of an object and keep the force constant, what
happens to the acceleration of the object?
38. Use Newton’s second law to explain the following:
a. Why does it take longer for a large semi to accelerate from a stop
than a small car?
b. Why is a full grocery cart more difficult to steer than an empty
cart?
39. What is the unit for force?
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40. Complete the following table:
Net Force (N)
Mass (kg)
Acceleration (m/s2)
1
10
2
2
25
5
3
4
3
4
50
10
41. A net force of 25 N is exerted on a cart causing it to accelerate at a rate of
5 m/s2. Determine the mass of the cart.
42. Use Newton’s third law to explain the following scenarios (include pictures):
a. A bird flying
b. A car driving
c. Skateboarding
43. What does friction mean?
44. What is momentum?
45. How is mass related to momentum?
46. How is velocity related to momentum?
47. What is momentum measured in?
48. Determine the momentum for the following items in the table:
Object
Mass (kg)
Velocity (km/h)
Momentum (kg-km/h)
Bus
8000
50
Football
0.5
40
Statue
1650
0
49. What is impulse?
50. How does impulse relate to momentum?
51. Describe scenarios that would fit with the following statements:
a. A large force for a short time
b. A small force for a long time
c. A large force for a long time
d. A small force for a short time
52. Calculate the breaking distance for the following velocities in the table
below:
Velocity (m/s)
Dry Pavement (m)
Wet Concrete (m)
Snow & Ice (m)
10
65
53. What is the difference between total stopping distance and braking
distance?
54. What would the total stopping distance be for a car that is traveling at 15
m/s on snow and ice with a driver reaction time of 2 seconds?
55. What would need a larger braking distance: Car A traveling at 30 m/s on
snow and ice OR Car B traveling at 25 m/s on wet pavement?
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56. What stops a vehicle during braking?
57. What are some safety precautions that have been put in place to reduce the
amount in injury upon impact with a car?
Formulae & Constants
Road Surface
Coeff. of Friction (k)
1km = 1000m
Dry Pavement
0.06
Wet Concrete
0.10
1h = 3600 s
I = Ft
F = ma
P = mv
a=
a=
=
d = kv2
=
TSD = kv2 + vt
Snow + Ice
0.15