Max
Question Objectives Score
Score
Multiple Choice 45
1
Complete the sentence 20
2
Study the First Newton’s Law 10
3
Calculation of acceleration 10
4
Draw free body diagram 15
5
Total 100
Question 1: Choose the letter of the term or phrase that best completes each statement or
best answers each question.
1. What is a force?
a) A state of rest
b) A state of motion
c) An action exerted on an object
d) A vector sum
2. What is the SI unit of force?
a) Meter
b) Joule
c) Newton
d) Watt
3. What can forces cause?
a) Nothing
b) Accelerations
c) Stagnation
d) Inertia
4. How are forces classified in terms of contact?
a) Through sound
b) Through light
c) Through touch
d) Through distance
5. What is force diagrams used for?
a) To show motion
b) To show direction
c) To show force vectors
d) To show color
6. What type of diagram shows only the forces acting on a single object?
a) Motion diagram
b) Force diagram
c) Energy diagram
d) Sound diagram
7. What is inertia?
a) Tendency of an object to move
b) Tendency of an object to resist motion
c) Tendency of an object to float
d) Tendency of an object to change shape
8. What law is often referred to as the law of inertia?
a) Newton's First Law
b) Newton's Second Law
c) Newton's Third Law
d) Einstein's Law
9. In equilibrium, what is the net force on an object?
a) Zero
b) Maximum
c) Variable
d) Negative
10. What is the gravitational force exerted on an object by Earth called?
a) Weight
b) Mass
c) Force
d) Inertia
11. What is the vector sum of all external forces acting on an object called?
a) Net force
b) Weight
c) Inertia
d) Acceleration
12. The average acceleration is the ratio of:
a) Δd/Δv
b) d/Δt
c) v/Δv
d) Δv/Δt
13. What is the SI unit of acceleration?
a) m/s
b) m2/s
c) m/s2
d) m⋅s2
14.When a car’s velocity is positive and its acceleration is negative, the car:
a) Slows down
b) Speeds up
c) Travels at constant speed
d) Remains at rest
15. Acceleration is defined as:
a) The rate of displacement
b) The rate of change of displacement
c) The change in velocity
d) The rate of change of velocity
Question 2
Write the correct term (or terms) in the space provided.
1. Acceleration is the ________ of the change in velocity.
2. A car with constant acceleration will have a ________ velocity.
3. The SI unit of velocity is ________.
4. If the initial velocity is zero, displacement depends only on ________.
5. If a plane accelerates at 4.8 m/s2 for 15 s, its speed at takeoff is ________.
6. The ________ is the vector sum of all forces acting on an object.
7. If the net force is ______ , the body is in equilibrium
Question 3
Write the answer to the following question in the space provided.
1. If a car is traveling westward with a constant velocity of 20 m/s, what is the net force
acting on the car?
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2. Can an object be in equilibrium if only one force acts on the object?
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Question 4 Critical Thinking Problems
1. A cat walking at 0.25 m/s sees a mouse and accelerates uniformly at 0.40 m/s2 for 3.0 s.
What is the cat's displacement during this time?
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2. An automobile with an initial speed of 4.3 m/s accelerates uniformly at 3.0 m/s2 for 5.0 s.
Find the final velocity and the displacement.
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Question 5
Draw and label the forces in the space provided.
A truck pulls a trailer on a flat stretch of road;
- The forces acting on the trailer are the force due to gravity (15 000 N downward), the force
exerted by the road (15 000 N upward), and the force exerted by the cable connecting the trailer
to the truck (10 000 N to the right).
- The forces acting on the truck are the force due to gravity (40 000 N downward), the force
exerted by the road (40 000 N upward), the force exerted by the cable (10 000 N to the left), and
the force causing the truck to move forward (16 000 N to the right).
1. Draw and label a free-body diagram of the trailer.
2. Draw and label a free-body diagram of the truck.
GOOD LUCK
