Forces and Motion Review

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Forces and Motion Review

• Balanced and Unbalanced Forces
• Mrs. Bixler-Zalesinsky

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Use this picture to answer the following
questions.
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1.

• 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

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2.

• After a students 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

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3.

• When the students 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

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4.

• When the force of the student acted on the figure
  above, which objects had velocity greater than
  zero?
• a. table
• b. apple
• c. books
• d. both b and c

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5.

• 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.

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6.

• 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.

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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.
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7.

• 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

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8.

• 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

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9.

• 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

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10.

• 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

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11.

• 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

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12.

• 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

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13.

• 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

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14.

• The difference between speed and velocity is that
  velocity includes
• a. direction b. time
• c. distance d. weight

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15.

• Which is an example of kinetic friction?
• friction between a cars 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

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16.

• 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 dont feel it.
• You are constantly changing direction.
• You are speeding up.
• You are slowing down

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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?
• 635 miles per hour
• 35,000 feet
• 16 minutes
• Cannot be determined

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18.

• Displacement
• 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

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19.

• The similarity between acceleration and velocity
  is that they both measure the
• rate of change of displacement
• rate of change of velocity
• change over time
• both a and b

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20.

• If the net force acting on a stationary object is
  zero, then the object will
• accelerate in the direction of the strongest
  force
• remain at rest
• begin moving backwards
• decelerate at a steady rate of speed

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21.

• 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

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Extended Response

• You may want to complete your pre-writing
  activities outside of class however, nothing can
  be brought into the test!

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22.

• 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.)

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23.

• Newtons 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.)