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Forces Review #1
Test Description: Forces
Instructions: Answer all questions to get your test result.
1) A woman at the grocery store applies 25.3N to a shopping cart. If she accelerates the cart at a rate of 0.966m/s² when she pushes the cart, what is the mass of the cart?
A
1830kg
B
26.2kg
C
223kg
D
25.3kg
2) If the net force acting on an object is not equal to zero, then the object is definitely
A
accelerating
B
losing mass
C
at rest
D
moving at a constant velocity
3) Which of the following is the tendency of an object to maintain its state of motion?
A
velocity
B
inertia
C
force
D
acceleration
4) an object at rest stays at rest and one in motion stays in motion unless an unbalanced force act on it is
A
law of thermodynamics
B
newtons 2nd law
C
newtons first law
D
newtons 3rd law
5) F=ma, to have a force you need a mass that is accelerating
A
newtons first law
B
law of thermodynamics
C
newtons second law
D
newtons 3rd law
6) for every action there is an equal and opposite reaction
A
newtons second law
B
newtons third law
C
1st law of thermodynamics
D
newtons first law
7) a coffee cup will sit on the table forever until someone moves it is an example of
A
newtons third law
B
newtons second law
C
1st law of thermodynamics
D
newtons first law
8) the ball will roll forever until an outside force (like friction) stops it. this follows which law
A
newtons first law
B
newtons third law
C
1st law of thermodynamics
D
newtons second law
9) if your sister hits you with a baseball bat, there will be more force behind it if it has a larger mass or if its accelerating. This is an example of
A
1st law of thermodynamics
B
newtons second law
C
newtons third law
D
newtons first law
10) a book sits on a table. The downward weight force of the book opposes the upward force of the normal force. this is an example of
A
law of inertia
B
newtons third law
C
newtons second law
D
newtons first law
11) the force that opposes something sliding across a surface is known as
A
weight force
B
friction force
C
normal force
D
force of air resistance
12) The downward weight force is opposed by an upward support force called
A
air resistance
B
push force
C
normal force
D
friction force
13) What is the unit for force?
A
J
B
W
C
F
D
N
14) If two forces are equal in size but opposite in direction, they are said to be______________ and would result in an object________________
A
balanced, not moving
B
unbalanced, not moving
C
balanced, moving
D
unbalanced, moving
15) A woman weighs 705.6N What is her mass?
A
68kg
B
72lbs
C
6,914.9kg
D
72kg
16) A 3.4kg book is thrown at a wall at a rate of 2.3m/s^2. What is the force applied to the wall as the book hits it?
A
7.8N
B
33N
C
1.5N
D
0.68N
17) Which of the following is NOT an example of a contact force:
A
Gravitational force
B
A push force
C
A pulling force
D
An applied force
18) In a free body diagram, the force of gravity is drawn as
A
A vector directed upward
B
A vector directed downward
C
A vector directed to the right
D
A vector directed either up or down
19) Magnetism is an example of a(n)
A
field force (action at a distance)
B
contact force
C
applied force
D
push force
20) one girl pushes with 12N to the right on a box. A second girl pushes to the right with 4N of force. A 3rd pushes to the left with 5N of force. What is the net force and in which direction?
A
11N to the right
B
11N to the left
C
16N to the right
D
21N to the right
*select an answer for all questions
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