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CBA#1 Review
Test Description: Review For CBA #1
Instructions: Answer all questions to get your test result.
1) A book is sitting on a table. Which of the following actions would add to its potential energy?
A
Sliding it across the table
B
Lifting it to a high shelf
C
Dropping it on the floor
D
Opening it to the middle
2) Which of the following examples best demonstrates kinetic energy?
A
A kite flying across the sky.
B
A television sitting on a table.
C
A brick lying on the ground.
D
A curtain hanging in the window.
3) A snowball sits at the top of the hill. Which of the following changes will increase the kinetic energy of the snowball?
A
The snowball is pushed and rolls down the hill, gaining speed.
B
Additional snow falls on the snowball, increasing its mass.
C
The snowball is moved and now sits on a hill that is higher.
D
The weather warms and the snowball melts, decreasing its mass.
4) Investigating which of the following questions would involve kinetic energy?
A
How does the color of a boat affect heat absorption?
B
Do boats float higher in salt or fresh water?
C
What is the effect of a boat’s shape on its speed?
D
What material makes the strongest boat?
5) Which of the following best represents potential energy?
A
Heat radiating from a large forest fire
B
Air leaking rapidly from a car tire
C
Water flowing through a rubber hose
D
A marble sitting at the top of a ramp
6) Potential energy and kinetic energy are similar in that both –
A
will produce an increase in the mass of an object.
B
depend on the height of an object above the ground.
C
are demonstrated when an object is at rest.
D
can each be converted into the other form.
7) An object that is at rest will begin to move if which of the following is true?
A
Unbalanced forces act on the object
B
Gravity on the object can be reduced
C
The surface on which it rests is frictionless
D
The mass of the object is sufficient
8) Which two measurements are needed in order to calculate the speed of an object in motion?
A
Time and mass
B
Volume and time
C
Force and distance
D
Distance and time
9) If the distance an object travels and the time it takes to travel the distance are known, which of the following can be calculated?
A
Instantaneous speed
B
Average acceleration
C
Instantaneous acceleration
D
Average speed
10) If an object travels 42 meters in 6 seconds, what is its average speed?
A
252 m/s
B
6 m/s
C
7 m/s
D
48 m/s
11) What motion will result from two forces acting on an object: one force of 50 Newtons to the east, the other a force of 30 Newtons to the west? The object will –
A
move west at a constant speed.
B
accelerate to the west.
C
move east at a constant speed.
D
accelerate to the east.
12) Calculate the net force of the following situation. -- 2N + -- 8N =
A
-- 10N
B
-- 6N
C
-- 6N
D
-- 10N
13) Which of the following examples best represents an object with balanced forces acting upon it?
A
A baseball thrown into the air
B
A book sitting on a high shelf
C
A wagon rolling down a steep hill
D
A boat moving through the water
14) Which of the following sets of forces acting on an object will result in the object moving?
A
0 Newtons Up and 0 Newtons Down
B
31 Newtons Left and 32 Newtons Right
C
9 Newtons Left and 9 Newtons Right
D
5 Newtons Up and 5 Newtons Down
15) Which of the following situations is an example of unbalanced forces acting upon an object?
A
A rock accelerating as it rolls down a hill
B
A car moving constantly at 30 miles per hour
C
A science text book lying on the floor
D
A rope being pulled from both sides with equal force
16) For an object to remain at rest, which of the following must be true?
A
The forces on it are balanced.
B
The object has no mass.
C
Gravity does not act on it.
D
There is no friction.
17) If an object increases in speed, it must be as a result of -
A
gravitational attraction.
B
increasing friction.
C
air resistance.
D
unbalanced forces.
18) 5.A ball is rolling across a field with a force of 30 N. If the force of friction from the field is 9.7 N, what would be the net force of the ball?
A
21.3
B
11.3
C
1.3
D
20.3
*select an answer for all questions
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