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