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WorksheetsChapter 2 Laws of Motion
Total questions: 34
Worksheet time: 21mins
True or false
Cars, airplane wings, and bike helmets are built in a streamlined shape to reduce inertia.
(a)
Which of the following is a force?
momentum
friction
acceleration
velocity
Which of the following is an example of a noncontact force?
musician playing piano
athlete hitting a ball with a bat
a ball falling after you toss it in the air
karate expert breaking a stack of wood
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 leaning on a wall
According to Newton's second law of motion, _________.
F = mv
F = m/a
a = F/m
F = ma
When you push downward on Earth to make a pole vault, Earth exerts an equal force on the pole.
(a)
A skater slowing as she slides across the ice is an example of _________.
inertia
momentum
friction
mass
The relationship among force, mass, and acceleration is stated in __________.
the law of conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
A 3,000 N force gives an object an acceleration of 15m/s2. The mass of the object is ____________.
45, 000 kg
1500 kg
200 kg
15 kg
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
True or false
Balanced forces acting on an object cause the object to accelerate.
(a)
The statement "for every action, there is an equal but opposite reaction" is a statement of ____________.
The law of conservation of momentum
Newton's first law
Newton's second law
Newton's third law
Complete the sentence
A(n) (a) is a push or a pull
An arrow can be used to represent a force. The length of the arrow represents ____________.
direction of the force
strength of the forced
mass of the force
acceleration of the force
The force that opposes motion is
a balanced force
an unbalanced force
an accelerating force
friction
Forces that are equal in size but opposite in direction are ___________.
balanced forces
frictional forces
inertial forces
net forces
Which of the following keeps a satellite in orbit?
frictional force
kinetic force
centripetal force
acceleration force
An object of large mass has ______ than an object of small mass.
less momentum
more momentum
less weight
greater acceleration
Which of the following is the equation for momentum?
p = m/v
p = m x v
p = v/m
p = w x s
Complete the statement
Forces that change an object's motion by touching the object are (a) forces.
True or false
An object with a mass of 9.0 kg has an acceleration of 3 m/s2. The force acting on it is 3 N.
(a)
The force you have to overcome to start an object moving is ______________.
rolling friction
static friction
sliding friction
air resistance
The upward force on an object falling through the air is __________.
air resistance
inertia
gravity
terminal velocity
If gravity did NOT affect the path of a horizontally thrown ball, the ball would ______________.
go straight up
travel horizontally
fall straight down
follow a curved path
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
The unit of force is __________.
m/s
the hertz
the joule
the newton
An unbalanced force acting on an object causes it to _________.
move at constant speed
continue in a straight line
not change its velocity
accelerate
Unbalanced forces can make an object accelerate by ____________.
changing its speed
changing its direction
both a and b
neither a nor b
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
John (m=67kg) foolishly attempts to jump from a canoe (m=45kg) to the dock. If he jumps forward with a speed of 3.3 m/s, how fast will the canoe move backward?
2.2 m/s
22 m/s
4.9 m/s
49 m/s
Which of the following best completes the phrase?
For every action there is ______.
a reaction
an equal reaction
an opposite reaction
an equal an opposite reaction
To keep a sled accelerating downhill, the force of gravity must be greater than the (a) force.
Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the __________ direction to that of the first object.
opposite
same
right angle
vertical
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
