Transcript Forces and Motion Review

Forces and Motion
Review
Balanced and Unbalanced Forces
Mrs. Bixler-Zalesinsky
Use this picture to answer the
following questions.
1.
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What forces are acting on the apple
when it is at rest on the books?
a. gravity
b. applied
c. normal
d. both a and b
2.
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After a student’s force acts on the
objects in the figure to remove the books
quickly and causing the apple to fall,
which object(s) did NOT accelerated?
a. apple
b. books
c. table
d. student
3.
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When the student’s force acts on the
diagram above, the main force acting on
the apple, which causes it to fall, is
which of the following?
a. gravitational b. frictional
c. air resistance d. normal
4.
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When the force of the student acted on
the figure above, which objects had
velocity greater than zero?
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a. table
b. apple
c. books
d. both b and c
5.
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A student collects and analyzes data
from the motion of the apple from the
time it rests atop the books until it is just
above the floor. Create a distance (m)
vs. time (s) graph that most closely
represents the motion of the apple for
this brief period of time.
6.
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The student collects and analyzes data of
the motion of the apple from the time it
rests atop the books until it is just above
the floor. Create a speed (m/s) vs. time
(s) graph that most closely represents
the motion of the apple for this brief
period of time.
7. – 9. Imagine a marble is going to
roll off of a book on an inclined
plane onto a stack of dominos like
the picture below.
7.
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In order to find the force that hit the
domino, you need to know what
measurements?
a. mass of the marble
b. acceleration of the marble
c. mass of the domino
d. both a and b
8.
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8. To find the acceleration of the marble,
you need to know which measurements?
a. mass of the marble
b. change in the velocity of the marble
c. time it took to travel
d. both b and c
9.
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To find the velocity of the marble, you
need to know which measurements?
a. mass of the marble
b. distance of wood
c. time it took to travel
d. both b and c
10.
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In some situations, friction is desirable,
which of the following are situations
where friction is desirable?
a. turning car
b. sledding
c. skiing
d. both b and c
11.
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In some situations, the effect of friction is
undesirable and needs to be minimized. In
which of the situations listed below would
friction be undesirable?
a. moving machine parts rubbing together
b. walking
c. warming hands
d. braking
12.
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In which of the following does torque
play a part?
a. opening a flip-top can
b. digging and lifting a shovelful of dirt
c. pedaling a bicycle
d. all of the above
13.
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Which of the following parts of a human
body does NOT contribute to maintaining
balance?
a. muscle and joints
b. heart
c. inner ear
d. eyes
14.
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The difference between speed and
velocity is that velocity includes
a. direction
b. time
c. distance
d. weight
15.
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Which is an example of kinetic friction?
friction between a car’s windshield and
the air as you drive into the wind
friction between your shoes and the
ground when you stand still
friction between a sticky note and the
page of a book as it marks your place
friction between your skin and a pencil
as it rests in your palm
16.
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A race car travels around a circular track.
Explain why the car is accelerating even
though the driver maintains a constant
speed.
Your foot pushes down on the
accelerator, but you just don’t feel it.
You are constantly changing direction.
You are speeding up.
You are slowing down
17.
An airplane is flying at 635 miles per hour at
an altitude of 35,000 feet. It is currently over
Kansas and is approximately 16 minutes ahead
of its scheduled arrival time. What is its speed?
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635 miles per hour
35,000 feet
16 minutes
Cannot be determined
18.
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Displacement
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must be in a particular direction
is the change in position of an object
must be the shortest distance possible
between two points
all of the above
19.
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The similarity between acceleration and
velocity is that they both measure the
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rate of change of displacement
rate of change of velocity
change over time
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both a and b
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20.
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If the net force acting on a stationary
object is zero, then the object will
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accelerate in the direction of the strongest
force
remain at rest
begin moving backwards
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decelerate at a steady rate of speed
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21.
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In order to determine if an object is
moving, you must observe the object in
relation to a ___.
a. curved path
b. moving object
c. reference point
d. force
Extended Response
You may want to complete your prewriting activities outside of class;
however, nothing can be brought into
the test!
22.
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Michael started piling books on a small
table. Eventually the table broke.
Which arrow represents the force of
gravity? (2 pts.)
Which arrow represents the force of the
table on the books? (2 pts.)
Explain why the table eventually broke.
(2 pts.)
23.
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Newton’s second law of motion states
the relationship between force, mass,
and acceleration as F = ma. According to
this law, what happens to the
acceleration of a given object with
constant mass when the force acting
upon it is increased, Explain your answer.
(2 pts.)