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Forces In Equilibrium Chapter 5 Review
Test Description: Made by Ms. Shirey for Principles of Physics
Instructions: Answer all questions to get your test result.
1) A vector is a quantity that has __________.
A
magnitude and time.
B
time and direction.
C
magnitude and direction.
2) A scalar is a quantity that has __________.
A
magnitude
B
time
C
color
D
direction
3) When representing velocity as a vector __________.
A
the direction of the arrow shows the direction of motion.
B
the length of the arrow is drawn to a suitable scale.
C
the length of the arrow represents the speed.
D
all of the above
4) The weight of a 1-kg mass is
A
9.8 pounds
B
1 pound
C
4.48 N
D
9.8 N
5) The force called weight comes from:
A
speed
B
acceleration
C
gravity
D
friction
6) If a block has 8 N acting on it to the right and 12 N acting on it to the left, what is the net force?
A
20 N left
B
20 N right
C
4 N right
D
4 N left
7) If 16 N acts towards the top and 16 N acts towards the bottom, what is the direction of the acceleration?
A
downwards
B
left
C
upwards
D
no acceleration
8) Which of the following does NOT describe an object in equilibrium?
A
A box is being lowered straight down on a rope at constant speed
B
A box is falling freely in the air with no strings attached
C
A box is resting on a table without moving
D
A box is being pushed at constant speed across the floor in a straight line
9) A table with four legs has a mass of 20 kg. A box with a mass of 50 kg sets on top of the table. How much force does EACH leg of the table exert down onto the floor?
A
17.5 newtons
B
49.0 newtons
C
171.5 newtons
D
122.5 newtons
10) The force acting perpendicular to a surface is the
A
electric force
B
normal force
C
friction force
D
gravitational force
*select an answer for all questions
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