Midterm Review

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Midterm Review

• Mr. Hauser

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Rules of the Game

• Working in TEAMS, you will be asked to answer
  questions from the assigned chapters.
• You have 30 seconds to write the answer down on
  the dry erase board.
• When the teacher says TIMES UP, a team leader
  will stand up and show the teacher their answer.

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Rules (Continued)

• Each correct answer is worth one point, unless
  otherwise stated.
• Teams can lose points for inappropriate conduct,
  comments, or cheating.
• The team with the most points at the end of the
  game wins!

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Question 1

• What is the area of physics that studies motion
  and its causes?

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ANSWER

• Mechanics

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Question 2

• Who is credited with defining the scientific
  method?

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ANSWER

• Galileo

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Question 3

• Name the three base quantities we will measure in
  physics.

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ANSWER

• Mass, Length, Time

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Question 4

• What are the base metric units for mass in
  physics?

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ANSWER

• Kilograms

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Question 5

• How many kg are in 12,700 grams?

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ANSWER

• 12.7 kg

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Question 6

• How many nm are in 0.0015 cm?

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ANSWER

• 15,000 nm

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Question 7

• True or False Weight and mass both mean the
  same thing.

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ANSWER

• False

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Question 8

• The acceleration due to gravity on Earth is what
  value? (include units)

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ANSWER

• -9.8 m/s2

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Question 9

• One second after starting from rest, a freely
  falling object will have a speed of about

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ANSWER

• 10m/s (9.8m/s)

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Question 10

• What are the metric units used to measure
  acceleration?

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ANSWER

• m/s2

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Question 11

• Velocity is a vector quantity because it has both
  
• action and reaction counterparts.
• magnitude and direction.
• mass and acceleration.

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ANSWER

• B. Magnitude (size) and direction.

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Question 12

• A feather and a penny are both dropped from rest
  from the same height inside a vacuum tube. The
  feather lands
• before the penny.
• after the penny.
• at the same time as the penny.

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ANSWER

• C. at the same time as the penny

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Question 13

• What is it called when a falling object no longer
  accelerates because of the air resistance force?

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ANSWER

• Terminal velocity

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Question 14

• Velocity can be found by calculating the slope of
  a _________ vs. time graph.

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ANSWER

• position or displacement

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Question 15

• If acceleration is positive and an objects
  initial velocity is negative, it is
• speeding up.
• slowing down.
• at rest.

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ANSWER

• B) Slowing down

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Question 16

• The average speed of a car in meters per second
  that goes 40 km in 20 minutes is

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ANSWER

• 33 m/s

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Question 17

• Find the acceleration of a boat that slows from
  15 m/s to 3.2 m/s in a time of 3 minutes

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ANSWER

• -0.066m/s2

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Question 18

• How long must a motorcycle jump be (length) in
  order to allow the driver to start from rest and
  attain a velocity of 41 m/s with an acceleration
  of 6.4 m/s2?

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ANSWER

• 131.3 meters

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Question 19

• The acceleration of a projectile at the very top
  of its flight is

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ANSWER

• -9.8 m/s2

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Question 20

• Find the vertical and horizontal components of an
  initial velocity of 45 m/s at an angle of 25
  degrees above the horizontal. You must label
  which is which.

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ANSWER

• Vx 40.8 m/s
• Viy 19.1 m/s

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Question 21

• A bullet is fired horizontally from a certain
  height at the same time a bullet is dropped from
  that same height. Which bullet lands first, the
  fired bullet, the dropped bullet, or do they hit
  at the same time?

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ANSWER

• They hit at the same time

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Question 22

• All projectiles trace a trajectory in the shape
  of a

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ANSWER

• Parabola

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Question 23

• For every action, there is an equal and opposite
  reaction is a statement of _______________.

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ANSWER

• Newtons Third Law

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Question 24

• An objects resistance to a change in its state
  of motion is called _________.

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ANSWER

• Inertia

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Question 25

• The mass of a pet turtle that weighs 10N is about
• 1kg
• 100kg
• 1000 kg
• 10 kg
• none of these

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ANSWER

• A. 1kg

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Question 26

• The force of friction on a sliding object is 10
  N. The applied force needed to maintain a
  constant velocity is
• Less than 10 N.
• More than 10 N.
• 10 N

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ANSWER

• C. 10 Newtons

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Question 27

• What is the only quantity that affects the amount
  of inertia something has?

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ANSWER

• mass

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Question 28

• Newtons Second Law states
• a ?F-M
• a ?F/m
• m ?F a
• ?Fm/a

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ANSWER

• B. a ?F/m

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Question 29

• A jet has a mass of 100,000kg. Each of its two
  engines has a force of 50,000N. What is the
  jets acceleration in meters per second squared?
• 1
• 2
• 4
• .25
• None of these

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ANSWER

• 1 m/s2

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Question 30

• What type of friction is always the largest?

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ANSWER

• Static

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Question 31

• A 250 kg motorcycle accelerates from rest to 22
  m/s in a time of 3.1 seconds. Find the size of
  the net force that caused it to do this.

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ANSWER

• 1,774 N

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Question 32

• A 0.4kg hockey puck slides on a perfectly
  frictionless surface. The force required to keep
  it moving is
• 4 Newtons
• 0.4 Newtons
• 40 Newtons
• 0 Newtons

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ANSWER

• 0 Newtons
• (an object in motion will stay in motion)

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Question 33

• A force applied over a distance is called
  ____________.

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ANSWER

• Work

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Question 34

• Energy of motion is called
• Potential
• Work
• Kinetic
• Chemical

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ANSWER

• Kinetic

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Question 35

• What are the metric units used to measure power?
  (Write out the word)

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ANSWER

• Watts

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Question 36

• Power is ________ related to time.
• A) directly
• B) inversely
• C) quadratically
• D) linearly

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ANSWER

• B) inversely

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Question 37

• _________ is defined as the ability to cause
  change or the ability to do work.

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ANSWER

• Energy

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Question 38

• If an object doubles its speed its kinetic energy
  will...
• be halved.
• double.
• quadruple.
• be reduced to one fourth.

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ANSWER

• C) quadruple

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Question 39

• How much work is done to lift a 45 kg weight up a
  distance of 6.2 meters at a constant velocity?

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ANSWER

• 2,734 Joules

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Question 40

• Energy can neither be created nor destroyed but
  it can be converted from one form to another.
  This statement is called ______.

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ANSWER

• Law of Conservation of Energy

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FINAL QUESTION

• A ball rolls off a table that is 0.87 meters high
  with a speed of 10m/s in the horizontal
  direction. How far away from the base of the
  table does it land?

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ANSWER

• 4.2 meters