Physics Review Sheet
A simple method of measuring the distance between the Earth and the Moon is to place in your line of sight to the Moon a
coin; telescope
If no external forces act on a moving object, it will
continue moving at the same speed
Compared with hang time on Earth, hang time on the Moon would be
greater
Whether a truck comes to a stop by crashing into a haystack or brick wall, the stopping force is
greater with the brick wal
When a boxer moves into an oncoming punch, the force experienced is
increased
An object with twice as much mass as another object has twice as much
inertia
The speedometer of an automobile reads
instantaneous speed
For every action force, there must be a reaction force that
is equal in magnitude
Whenever the net force on an object is zero, its acceleration
is zero
An object that has kinetic energy must be
moving
To produce an acceleration to a system there
must be a net force on the system
A hockey puck sliding across the ice finally comes to rest because
of friction
The accelerations possible for a ball on an inclined plane
range from zero to g
Two equal-size vectors at right angles to each other have a resultant that is
root 2 the length of either vector
A truly educated person is knowledgeable about
science, the arts, and religion
While an iron block near the Earth's surface is in free fall, it undergoes an increase in
speed
Tension is actually a force that tends to
stretch something
No work is done by gravity on a bowling ball that rolls along a bowling alley because
the force on the ball is at right angles to the ball's motion
Relative to an initial height, an object raised twice as high has a gravitational potential energy
twice as much
For a scientific hypothesis to be valid, there must be a test for proving it
wrong
The net force on any object in equilibrium is
zero
One end of a rope is pulled with 100 N, while the opposite end also is pulled with 100 N. The tension in the rope is
100 N
Nellie pulls with a force of 50 N on a horizontal rope tied to a tree at rest. The net force on the rope is
0 and rope tension is 50 N
Two students engaged in a tug war each pull a rope in opposite directions with a force of 400 N. The net force on the rope is
0 and the rope tension is 400 N
The mass of a pet turtle that weighs 10 N is about (kg)
1 kg
A 1 kg mass at the Earth's surface weighs
10 N
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is
10 N
The support force on a 10 N book at rest on a table is
10 N
A piece of rope is pulled by two people in a tug of war. Each exerts a 400 N force. What is the tension in the rope
400 N
If an object moves with constant acceleration, its velocity must
change by the same amount each second
The first scientist to introduce the concept of inertia was
Galileo
An object's weight is properly expressed in units of
Newtons
Which of the following is a vector quantity? - area, volume, or mass
None
The safest way to view an image of the sun is to us
a pinhole
If you double the net force on an object, you'll double its
acceleration
A feather and a coin dropped in a vacuum fall in equal
accelerations
If Nellie hangs from a horizontal bar that is supported by four vertical ropes, the tension in the ropes
add to equal her weight
A vehicle undergoes acceleration when it gains speed, loses speed, or changes in direction
all of them
An object in mechanical equilibrium is an object moving with constant velocity, having no changes in velocity, or at rest
all of them
Compared to a 1 kg block of solid iron, a 2 kg block of solid iron has twice as much inertia, mass, or volume
all of them
When a ball falls downward, it may have a net force - equal to its weight, of zero, or equal to its weight minus air drag
any of them
Which task requires more work - lifting a 50 kg sack 2 meters, or lifting a 25 kg sack 4 meters
both require the same amount of work
When you drop a rubber ball on the floor it bounces back. The force exerted on the ball produce bouncing is by the
floor
The newton is a unit of
force
The work you have to do when pushing a shopping cart twice as far while applying twice the force is
four times as much
Science and technology are
fundamentally different from each other
