Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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An astronaut is standing on the deck of a spacecraft which is orbiting Earth. He
throws a moon rock sample towards outer space (where there is no friction). How much force is needed
to keep the rock moving?
a. | No force is needed | c. | Double the original force | b. | The same as the
original force | d. | One half the
original force |
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2.
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John accidentally left his books on top of his mom’s car before they left
for school. The books stayed on top of his car while they were driving north on Oak Avenue. Then,
when they made a sharp turn eastward onto Harris Lane, his books fell off the top of his car and onto
the street.
a. | The people that live on Harris Lane hate reading, which caused the books to
fall. | b. | The Earth's magnetic field held the books on John's car while he headed
north. When he turned east, the magnetic pull faded, causing the books to fall. | c. | When John's car
turned eastward, his books continued heading northward, causing them to slide off the top of his car
and fall. | d. | The force of gravity caused John's books to slide across the top of his car and
fall. |
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3.
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A ball is thrown straight up in the air. According to Newton's first law of
motion, what is the reason for the ball falling back to Earth?
a. | It is accelerating in the same direction as Earth's gravitational force on
it. | b. | The change in the ball's acceleration is proportional to the force acting on
it. | c. | The ball exerts a force on the air surrounding it. | d. | A force has acted on
it. |
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4.
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Two teams are playing tug-of-war. Each team is pulling on the rope with a force
of 500 newtons. A ribbon is tied to the middle of the rope to determine the winner. Which of the
following would result in the greatest acceleration of the ribbon?
a. | A player added to Team A pulls with a force of 250 newtons and a player added to Team
B pulls with a force of 250 newtons. | b. | A player added to Team B pulls on the rope with
a force of 120 newtons. | c. | A player added to Team A pulls on the rope with
a force of 130 newtons. | d. | A player on Team B who was pulling with a force
of 150 newtons leaves the game. |
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5.
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When a gallon of milk on Earth is compared to the same gallon of milk in space,
the milk on Earth has the same mass but a different __________.
a. | volume | c. | amount of matter | b. | weight | d. | inertia |
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6.
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When two birds are pulling on a worm and the worm moves toward the first bird,
you know that the forces are ____.
a. | long-range | c. | unbalanced | b. | action-reaction | d. | balanced |
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7.
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You hear that a storm is moving 15 km/h north. You have been given the
storm's ____.
a. | acceleration | c. | velocity | b. | average speed | d. | constant speed |
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8.
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Which of the following is NOT an acceleration?
a. | riding your bike straight down the street at a constant speed | b. | riding your bike
faster when you head down a hill | c. | slowing your bike ride so you can make it up a
hill | d. | stopping your bike at an intersection |
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9.
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Two identical plastic bottles are dropped at the same time from a high tower.
One of the bottles is completely filled with water and the other is only half full of
water.
Which of the following statements is true?
a. | The bottles experience different air resistences so the lighter bottle will hit
before the filled bottle. | b. | The bottles will hit at the same time because
they are accelerating due to gravity and they encounter the same air resistence. | c. | The bottles have the
same air resistence, but the filled bottle is heavier and will hit the ground
first. | d. | The amount of water doesn't matter because there is no air
resistence. |
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10.
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An unbalanced force acting on an object causes it to ____.
a. | not change its velocity | c. | accelerate | b. | move at constant
speed | d. | continue in a
straight line |
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11.
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Hannah just finished building a house of cards that stands four stories high.
She is worried that it will fall down. Which of the following statements must be true?
a. | If Hannah adds another card to the house of cards, then it will fall
down. | b. | If no unbalanced force acts upon the house of cards, then it will remain standing
forever. | c. | As long as nobody touches the house of cards, it will remain
standing. | d. | A house of cards is too fragile and must fall down eventually due to
gravity. |
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12.
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The relationship among force, mass, and acceleration is stated in ____.
a. | Newton's second law of motion | c. | the law of conservation of
momentum | b. | Newton's first law of motion | d. | Newton's third law of
motion |
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13.
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If gravity did not affect the path of a horizontally thrown ball, the
ball would ____.
a. | travel horizontally | c. | go straight up | b. | fall straight down | d. | follow a curved
path |
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14.
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When a car slows down at a traffic light, it is ____.
a. | changing direction | c. | accelerating | b. | decreasing its displacement | d. | traveling at constant
velocity |
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15.
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Every force has a(n) ____ force.
a. | reaction | c. | opposite | b. | accelerating | d. | long-range |
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16.
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Force pairs act in __________ and are __________ in size.
a. | opposite directions, unequal | b. | the same direction, unequal | c. | opposite
directions,always equal | d. | the same direction, always
equal |
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17.
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An object is not considered accelerating when
a. | it is turning | c. | it is slowing down | b. | it is speeding up | d. | it is not
moving |
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18.
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If all of the following vehicles are traveling at 30 miles per hour on a
straight road, which vehicle would be the hardest to stop?
a. | a tractor trailer loaded with foam rubber | c. | a tractor
trailer | b. | a bicycle | d. | a
compact car |
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19.
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Amyx is building a treehouse in his backyard. He notices that every time he
strikes a nail with the hammer, the hammer bounces back just a little bit as the nail goes farther
into the wood. This is because when the hammer strikes and exerts a force on a nail, the nail
a. | exerts an equal and opposite force back on the hammer. | b. | is stuck and
won't go any further into the wood. | c. | disperses the force of the impact throughout
the wood. | d. | creates a balanced force. |
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20.
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According to Newton's 1st law of motion, which object below will not change
speed or direction of motion without something acting on it?
a. | the Moon in its orbit around the Earth | b. | a soccerball flying through the
air | c. | a ball rolling across the grass | d. | a jar sitting on a
shelf |
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21.
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The Earth exerts a pull on the Moon through its gravitational force. According
to Newton's 3rd law of motion, the Moon must also be exerting a pull on the Earth. Which of
these observations is evidence of the Moon's pull?
a. | Earth's high tides are highest closest to and farthest from the location of the
Moon. | b. | The cycle of the phases of the Moon seen from Earth lasts about a
month. | c. | Earthquakes originate at locations where Earth's crustal plates
meet. | d. | From the Earth, the visible face of the Moon is always the
same. |
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22.
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Friction is a force that can oppose the motion of two objects that are in
contact with one another. Which of the following are examples of
friction?
I. A space probe orbits the
Moon.
II. A parachute softens the landing of a
skydiver.
III. A nail holds two wooden boards
together.
IV. The brakes on a bike rub against the wheel.
a. | II, III, and IV only | c. | II and III only | b. | I and IV only | d. | I, II, III, and
IV |
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23.
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You throw a ball into the air. As the ball leaves your hand, the force(s) acting
on it is/are ____.
a. | your hand | c. | gravity and your hand | b. | gravity | d. | balanced |
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24.
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Tom is teaching Jenny how to ice skate. Both skaters, who are about the same
size, are on the ice and wearing their skates. To help Jenny get started, Tom gives her a gentle push
from behind. Which of the following best describes what will happen next?
a. | Jenny will move backward and Tom will move forward. | b. | Jenny will move
forward. | c. | Tom will move backward. | d. | Jenny will move forward and Tom will move
backward. |
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25.
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Which of the following can best help to determine if one object's inertia
(mass) is greater than another's if a balance is not used?
a. | Put the objects in separate hands and raise and lower your hands
repeatedly. | b. | Throw the objects at a target and see which one gets there first. | c. | Place the objects in
water and see which one raises the water level the highest. | d. | It would be
impossible to determine which has a greater mass without a balance. |
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