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Physics 11 Test SAMPLE
Chapters 4 & 5 - Dynamics
Physicist:___________________
Part I- Multiple choice: Answer each question by shading the most appropriate bubble.
01. Newton’s _____ law states that an object at rest (or constant motion) tends to want
to stay at rest (or in constant motion) unless acted upon by an external net force.
a. first b. second c. third
02. You are driving your car down the highway when you suddenly apply the brakes to
avoid hitting a pothole. The car stops abruptly but you lurch forward, eventually coming
to a stop. This scenario is an example of which of Newton’s laws of motion?
a. first b. second c. third
03. Which cart has the greatest inertia?
a. a 1-kilogram cart traveling at a speed of 4 m/s
b. a 2-kilogram cart traveling at a speed of 3 m/s
c. a 3-kilogram cart traveling at a speed of 2 m/s
d. 4-kilogram cart traveling at a speed of 1 m/s
04. TRUE or FALSE: A car making a turn with a constant speed would be considered a
non-inertial frame of reference.
a. TRUE b. FALSE
05. Newton’s _____ law states that the acceleration of a body is directly proportional to
the net force on it and inversely proportional to its mass.
a. first b. second c. third
06. During an air table experiment, a student pushes a puck and then releases the puck.
During the time of contact, the motion diagram of the puck shows increasingly spaced
dots. This scenario is an example of which of Newton’s laws of motion?
a. first b. second c. third
07. Which of the following is a contact force?
a. friction b. gravity c. magnetism d. electrostatic
08. The amount of gravitational force the Earth exerts on an object at the Earth’s surface
is referred to as the object’s _____.
a. weight b. mass c. friction d. normal force
(20 points)
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09. What does the symbol g represent?
a. the force of gravity
b. the acceleration due to gravity
c. the coefficient of friction
d. normal force
10. How does the acceleration due to gravity on the Moon compare with that of the
Earth?
a. The Moon has a greater acceleration due to gravity.
b. The Moon has a smaller acceleration due to gravity.
c. The acceleration due to gravity is the same on both planets.
d. There is not enough information provided to answer the question correctly.
11. Difficulty is pushing a large crate from rest results from
a. static friction. b. gravity. c. balanced forces. d. kinetic friction.
12. The force that causes a moving object to slow down on a surface is called ______.
a. static friction. b. gravity. c. balanced forces. d. kinetic friction.
13. When an object exerts a force on a flat surface, that surface will exert a force back
on the object in a direction perpendicular to the surface. Such a force is called a _____
force.
a. static friction b. kinetic friction c. normal d. gravitational
14. The ratio of the force of friction between an object and the surface it rest upon and
the normal force exerted by the surface on the object is defined as the _____.
a. static friction b. kinetic friction c. coefficient of friction d. weight
15. Two boxes of similar construction rest on a concrete floor. One box has a mass of
10.0 kg and the other, 5.0 kg. Which of the boxes has the greater static friction?
a. the 10.0-kg box
b. the 5.0-kg box
c. both boxes have the same amount of static friction
d. not enough information to answer the question correctly
Physics 11 SAMPLE Test - Dynamics
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16. The diagram below represents a block at rest on an incline.
Which diagram best represents the forces acting on the block? (Ff = frictional force,
FN = normal force, and Fg = weight.)
a.
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17. TRUE or FALSE: Force is a scalar quantity.
a. TRUE b. FALSE
18. The vector diagram below represents two forces, F1 and F2, simultaneously acting
on an object.
Which vector best represents the resultant of the two forces?
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19. The relationship that describes the amount of spring, restorative force that develops
in a spring when it is stretched or compressed is called
a. Hooke’s law. b. Newton’s 2nd law of motion. c. Jude Law
20. Compare the spring constants in a Slinky (k 1) with the spring used in the suspension
system of an automobile (k2):
a. k1 > k2 b. k1 < k2 c. k1 = k2
Part II- Numeric Response: Answer each question on the test paper in the space provided.
(34 points)
21. You measure a car moving past you accelerating at 5.0 m/s2. You also know that the engine exerts 5500 N to the axle to
cause the acceleration. What is the mass of the vehicle? Include a free-body diagram in your response. (4 points)
22. A 10.0-kg bag of potatoes rests on a horizontal table top. The static friction between the bag and the table is 57.9 N.
What is the coefficient of static friction? Include a free-body diagram in your response. (4 points)
23. Craig pulls a wagon across the floor. The horizontal component of the applied force is 21.0 N. The applied force is
directed at 42.0o to the horizontal. What is the magnitude of the applied force? Include a free-body diagram in your response.
(4 points)
Physics 11 SAMPLE Test - Dynamics
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24. A 2.0-kg mass (m1) and a 8.0-kg mass (m 2) are attached to a cord that passes over a frictionless pulley
as shown to the right. What is the acceleration of the system? What is the tension in the cord?
Include a free-body diagram in your response. (7 points)
25. A 21.0-kg block with travels along a horizontal wooden table with an acceleration of 5.62 m/s2. The coefficient of kinetic
friction is 0.33. Include a free-body diagram in your response. (7 points)
a. Find the horizontal force necessary to give the block an acceleration of 5.62 m/s2.
b. If the block is initially at rest when the force is applied and travels for 3.08 s, what is its final velocity at that time?
26. A 2.4 x 103 kg car accelerates up a ramp (45o to the horizontal). The rate of acceleration is 7.5 m/s2. The coefficient of
kinetic friction between the tires and the ramp is 0.90. Include a free-body diagram in your response. (4 points)
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a. Calculate F II and F  for the car.
b. Calculate the applied force produced by the axles of the car in order to cause the acceleration.
27. A 47.0-N box is pulled along a horizontal surface by a 25.0-N weight hanging from a low-mass cord along a low-friction
pulley. The coefficient of kinetic friction between the box and the surface is 0.16.
What is the acceleration of the system? Include a free-body diagram in your response. (4 points)
Physics 11 SAMPLE Test - Dynamics
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