CHAPTER 2 PRACTICE TEST

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• CHAPTER 2 PRACTICE TEST

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• MULTIPLE CHOICE

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• THE TENDENCY OF AN OBJECT TO RESIST CHANGE IN ITS
  MOTION IS KNOWN AS

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• INERTIA

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• WHAT HAPPENS WHEN TWO FORCES ACT IN THE SAME
  DIRECTION?

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• THEY ADD TOGETHER

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• WHICH OF THE FOLLOWING IS AN EXAMPLE OF EXERTING
  A FORCE
• A CHILD RUNNING THROUGH A FIELD
• B. A CARPENTER HAMMERING A NAIL

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• B. A CARPENTER HITTING A NAIL

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• THE GREATER THE MASS OF AN OBJECT THE GREATER IS
  ITS

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• INERTIA

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• FORCE MASS _________

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• ACCELERATION

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• ONE WAY TO INCREASE ACCELERATION IS BY

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• DECREASING MASS

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• THE FORCE THAT ONE SURFACE EXERTS ON ANOTHER WHEN
  THE TWO RUB AGAINST EACH OTHER IS CALLED

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• FRICTION

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• WHICH OF THE FOLLOWING IS AN EXAMPLE OF ROLLING
  FRICTION?
• YOUR SHOES ON A SIDEWALK
• B. BIKE TIRES ON THE ROAD

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• B. BIKE TIRES ON THE ROAD

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• WHEN THE ONLY FORCE ACTING ON AN OBJECT IS
  GRAVITY, THE OBJECT IS SAID TO BE IN.

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• FREE FALL

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• AIR RESISTANCE IS A TYPE IS OF

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• FRICTION

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• THE FORCE OF GRAVITY ON A PERSON OR OBJECT AT THE
  SURFACE OF A PLANET IS KNOWN AS

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• WEIGHT

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• WEIGHT MASS __________

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• ACCELERATION DUE TO GRAVITY

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• IF YOU WERE ON THE MOON, YOUR WEIGHT WOULD BE
  ROUGHLY WHAT FRACTION OF YOUR WEIGHT ON EARTH?

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• ONE SIXTH

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• THE LAW OF UNIVERSAL GRAVITATION STATES THAT ANY
  TWO OBJECTS IN THE UNIVERSE, WITHOUT EXCEPTION,

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• ATTRACT EACH OTHER

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• TWO FIGURE SKATERS WHO PUSH OFF OF EACH OTHER
  WILL MOVE AT THE SAME SPEED IF

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• THEY HAVE THE SAME MASS

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• FORCES CAN BE ADDED TOGETHER ONLY IF THEY ARE

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• ACTING ON THE SAME OBJECT

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• THE PRODUCT OF AN OBJECTS MASS AND VELOCITY IS
  CALLED ITS

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• MOMENTUM

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• ACCORDING TO THE LAW OF CONSERVATION OF MOMENTUM,
  WHEN TWO OBJECTS COLLIDE IN THE ABSENCE OF
  FRICTION, .

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• MOMENTUM IS NOT LOST

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• THE ACHIEVEMENT OF LIFTING A ROCKET OFF THE
  GROUND AND INTO SPACE CAN BE EXPLAINED BY

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• NEWTONS THIRD LAW

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• WHAT IS REQUIRED FOR A ROCKET TO LIFT OFF INTO
  SPACE?

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• THRUST THAT IS GREATER THAN EARTHS GRAVITY

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• AN OBJECT THAT TRAVELS AROUND ANOTHER OBJECT IN
  SPACE IS CALLED A

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• SATELLITE

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• ANY FORCE THAT CAUSES AN OBJECT TO MOVE IN A
  CIRCLE IS CALLED A

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• CENTRIPETAL FORCE

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• IN PHYSICAL SCIENCE, A PUSH OR A PULL IS CALLED
  A(N).

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• FORCE

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• THE MOMENTUM OF AN OBJECT IS IN THE SAME
  DIRECTION AS ITS

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• VELOCITY

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• HOW CAN YOU INCREASE THE MOMENTUM OF AN OBJECT?

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• BY INCREASING ITS MASS

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• THE AMOUNT OF MATTER IN AN OBJECT IS CALLED ITS

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• MASS

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• WHICH OF THE FOLLOWING IS AN EXAMPLE OF
  INCREASING FRICTION INTENTIONALLY?
• WAXING SKIS
• B. THROWING SAND ON AN ICY DRIVEWAY

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• B. THROWING SAND ON AN ICY DRIVEWAY

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• THE FORCE THAT PULLS FALLING OBJECTS TOWARD EARTH
  IS CALLED

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• GRAVITY

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• A LEAF FLUTTERS INSTEAD OF DROPPING STRAIGHT TO
  THE GROUND WHEN IT FALLS FROM A TREE BECAUSE IT
  EXPERIENCES.

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• AIR RESISTANCE

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• ACCORDING TO NEWTONS THIRD LAW OF MOTION, WHEN A
  HAMMER STRIKES AND EXERTS FORCE ON A NAIL, THE
  NAIL.

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• EXERTS AN EQUAL FORCE BACK ON THE HAMMER

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TRUE/FALSE

• CORRECT THE FALSE PROBLEMS

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• ACCORDING TO NEWTONS SECOND LAW OF MOTION, FORCE
  EQUALS MASS TIMES WEIGHT.

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• FALSE/ ACCELERATION

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• THE FORCE THAT KEEPS A SATELLITE IN EARTH ORBIT
  IS ALWAYS DIRECTED AWAY FROM THE CENTER OF THE
  EARTH.

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• FALSE/ TOWARD

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• UNBALANCED FORCES MAINTAIN MOTION AT CONSTANT
  VELOCITY.

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• FALSE, BALANCED

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• THE PROPERTY OF MATTER THAT RESISTS A CHANGE IN
  MOTION IS CALLED INERTIA.

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• TRUE

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• FRICTION DEPENDS ON THE TYPES OF SURFACES
  INVOLVED AND HOW HARD THE SURFACES PUSH TOGETHER.

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• TRUE

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• THE FORCE OF GRAVITY DECREASES AS THE MASSES OF
  OBJECTS INCREASE.

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• FALSE/ INCREASES

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• WHEN THE ONLY FORCE ACTING ON A FALLING OBJECT IS
  AIR RESISTANCE, THE OBJECT IS SAID TO BE IN FREE
  FALL.

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• FALSE/ GRAVITY

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• NEWTONS THIRD LAW OF MOTION EXPLAINS THAT FORCES
  ACT ALONE.

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• FALSE/ IN PAIRS

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• A UNIT OF MOMENTUM IS KGM/S/S.

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• TRUE

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• A ROCKET WILL MOVE UPWARD AS LONG AS THE THRUST
  IS GREATER THAN THE PULL OF GRAVITY.

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• TRUE

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COMPLETION
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• THE MEASURE OF AN OBJECTS ___________ IS A
  MEASURE OF THE OBJECTS INERTIA

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• MASS

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• UNBALANCED FORCES ACTING ON AN OBJECT
  PRODUCE___________ MOTION.

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• ACCELERATED

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• THE OVERALL FORCE ON AN OBJECT AFTER ALL THE
  FORCES ARE ADDED TOGETHER IS CALLED THE ______
• FORCE.

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• NET

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• ONE _______ IS THE FORCE REQUIRED TO ACCELERATE
  ONE KILOGRAM OF MASS AT 1 METER PER SECOND PER
  SECOND.

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• NEWTON

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• A PERSON TRAVELING IN A CAR THAT STOPS SUDDENLY
  KEEPS MOVING FORWARD DUE TO ___________.

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• INERTIA

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• WET PAVEMENT IS MORE SLIPPERY THAN DRY BECAUSE
  THE FORCE NEEDED TO OVERCOME _______
• FRICTION IS LESS THAN THE FORCE NEEDED TO
  OVERCOME SLIDING FRICTION.

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• FLUID

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• THE DOWNWARD FORCE ACTING ON AN OBJECT IN FREE
  FALL IS THE FORCE OF ________.

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• GRAVITY

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• WHEN ________ EQUALS THE FORCE OF GRAVITY ON A
  FALLING OBJECT, THE OBJECT REACHES TERMINAL
  VELOCITY.

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• AIR RESISTANCE

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• A(N) ______ IS AN OBJECT THAT IS THROWN.

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• PROJECTILE

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• THE METRIC UNIT THAT IS MOST OFTEN USED TO
  DESCRIBE WEIGHT IS THE _________.

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• NEWTON

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• AS THE DISTANCE BETWEEN TWO OBJECTS DECREASES,
  THE GRAVITATIONAL FOCE BETWEEN THEM __________.

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• INCREASES

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• ACCORDING TO NEWTONS THIRD LAW OF MOTION, THE
  STRENGTH OF A REACTION FORCE IS _______ THE
  STRENGTH OF THE ACTION FORCE.

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• EQUAL TO

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• THE FORCE OF GRAVITY BETWEEN YOU AND EARTH IS
  GREATER THAN THE FORCE OF GRAVITY BETWEEN YOU AND
  A CAR BECAUSE EARTH HAS MORE _______ THAN THE CAR.

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• MASS

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• IF THE ACTION FORCE OF A BAT STRIKING A BALL
  ACCELERATES THE BALL IN ONE DIRECTION, THE
  REACTION FORCE ACCELERATES THE BAT IN THE
  _______________ DIRECTION.

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• OPPOSITE

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• THE MOMENTUM OF A ROLLER SKATER IS NOT CONSERVED
  BECAUSE _________ ACTS ON THE SKATES.

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• FRICTION

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• THE MOMENTUM OF AN OBJECT IS IN THE SAME ________
  AS ITS VELOCITY.

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• DIRECTION

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• DURING LIFT-OFF, THE THRUST ON A ROCKET IS
  DIRECTED _________.

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• UPWARD

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• FRICTION ACTS IN A DIRECTION _______ TO AN
  OBJECTS DIRECTION OF MOTION.

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• OPPOSITE

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• THE MOON IS A NATURAL ________
• OF EARTH.

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• SATELLITE

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• THE FORCE OF GRAVITY IS RESPONSIBLE FOR
  CONTINUOUSLY CHANGING THE _________ IN WHICH A
  SATELLITE MOVES.

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• DIRECTION

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TA DA!!!

• THE END