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WorksheetsSc. Ch. 11 Review, Newton's Laws
Total questions: 30
Worksheet time: 30mins
The force that opposes (or resists) motion is ______.
a balanced force
an unbalanced force
an accelerating force
friction
When two birds are pulling on a worm and the worm moves toward the first bird, you know that the forces are _______.
long-range
action-reaction
unbalanced
balanced
An object's weight is ______ its mass.
equal to
less than
proportional to
greater than
Two toy cars with the same mass and speed move toward each other, collide, and stick together. After colliding, the momentum of the cars is _______.
twice the original momentum
half the original momentum
the same as the original momentum
ten times the original momentum
A planet, the same size as Earth but twice the mass, is discovered. If you weigh 700 N on Earth, what do you weigh on the new planet?
350 N
700 N
1,400 N
2,800 N
According to Newton's second law of motion, ____.
F = mv
F = m/a
a = F/m
F = ma
The force you have to overcome to start an object moving is ___.
rolling friction
static friction
sliding friction
air resistance
Forces that are equal in size but opposite in direction are ___.
balanced forces
frictional forces
inertial forces
net forces
We are able to walk forward because ___.
we push on the air
we push on the ground
the air pushes on us
the ground pushes on us
A collision is considered elastic if ___.
the objects do not stick together
the objects that collide don't get warmer
after the collision, the objects have the same shape as before the collision
all of the above
A 300-N force acts on a 25-kg object. The acceleration of the object is ___.
7,500 m/s/s
300 m/s/s
25 m/s/s
12 m/s/s
Which of the following keeps a satellite in orbit?
frictional forces
kinetic force
centripetal force
acceleration force
Which of the following is NOT an example of circular motion?
car turning a corner
yo-yo on a string going in a circle
car accelerating onto highway
the Moon's path around Earth
Which of the following is an example of an unbalanced force?
book sitting on a table
car sitting in the garage
person on an elevator going down
person learning on a wall
Which of the following is a force or motion that is involved in the Moon orbiting Earth?
a force pulling the Moon toward the center
a speed at right angles to the line from the mass of the Moon to the center of Earth
acceleration toward the center of Earth
all of the above
When an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the ___ direction of the first object.
opposite
same
right angle
vertical
A skater slowing as she slides across the ice is an example of ____.
inertia
momentum
friction
mass
An object of large mass has ___ than an object of small mass.
less momentum
more momentum
less weight
greater acceleration
A student hits a nail with a hammer. During the collision, there is ___.
a force on the hammer but not on the nail
a force on the nail but not on the hammer
a force on the nail and also on the hammer
no force on either object in the collision
What is the momentum of a 250-kg motorcycle traveling at 25 m/s?
6,250 kg x m/s
625 kg x m/s
100 kg x m/s
10 kg x m/s
Example: Two football players collide and stick together
Newton's First Law - Inertia
Newton's Second Law - Acceleration
Newton's Third Law - Momentum
Example: Swinging a ball on a string around your head
Newton's First Law - Inertia
Newton's Second Law - Acceleration
Newton's Third Law - Momentum
Example: a girl pushes a sled and the sled accelerates
Newton's First Law - Inertia
Newton's Second Law - Acceleration
Newton's Third Law - Momentum
Example: a rocket takes off because the force from the engines pushes on the ground
Newton's First Law - Inertia
Newton's Second Law - Accelerates
Newton's Third Law - Momentum
Example: a balloon flies off when the opening is released
Newton's First Law - Inertia
Newton's Second Law - Acceleration
Newton's Third Law - Momentum
Friction is a force that speeds up motion between two surfaces that are in contact.
True
False
A ball is thrown horizontally. Gravity causes the ball to continue to move horizontally.
True
False
A car goes around a curve at a constant speed. There is not a net force acting on it.
True
False
Acceleration is caused by any forces.
True
False
Sliding friction keeps you in the seat when a car goes around a corner.
True
False
