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Chapter 1&2
Test Description: Forces Friction Gravity Air Resistance
Instructions: Answer all questions to get your test result.
1) When the net forces equal 0 N, they are which of the following
A
unbalanced
B
a push
C
a pull
D
balances
2) What is a force that opposes motion between two surfaces that are in contact?
A
velocity
B
acceleration
C
motion
D
friction
3) As the distance between two objects increases, the force of gravity between them
A
decreases
B
increases greatly
C
does not change
D
increases only slightly
4) Which of the following is opposed by static friction?
A
a pencil rolling on a table
B
a worker pushing on a non-moving box
C
a chair sliding on the floor
D
a dog running in a yard
5) When a mover puts furniture on wheels, what type of friction is the mover using to make the job easier
A
sliding kinetic friction
B
rolling kinetic friction
C
static friction
D
gravitational friction
6) The law of universal gravitation says that gravitational force is
A
related to weight and friction
B
related to mass and friction
C
related to mass and distance
D
related to weight and distance
7) What feature of an object does not affect air resistance?
A
its size
B
its speed
C
its chemical properties
D
its shape
8) Why does a ball thrown horizontally follow a curved path downward?
A
the ball is accelerated by gravity in the vertical direction only
B
the ball is accelerated in both the vertical and horizontal directions
C
the ball is accelerated in the horizontal direction only
D
there is no acceleration on the ball
9) An object is considered in free fall when the force of gravity
A
is the only force acting on the object
B
is equal to the force of air resistance
C
is less than the force of air resistance
D
is greater than the force of air resistance
10) To produce a change in motion, a force must be a(n)
A
frictional force
B
unbalanced force
C
balanced force
D
gravitational force
*select an answer for all questions
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