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