Physics Review

A car rounds a curve on a level road. The centripetal force on the car is provided by

friction between the tires and the road

The weight of an object is

greater at the poles than at the equator

A stone is thrown upward from a roof at the same time as another, identical stone, is dropped from the roof. The two stones

have the same acceleration when they reach the ground

Centripetal acceleration is always pointed

inward

A bullet is fired upward. As it rises,

its mass remains the same while its weight decreases

Gravity develops due to primarily

mass

Which of the following is not a vector quantity?

mass

Something that has only magnitude is called a

scalar

Using a laser to checkout at the store is

technology

When a boy pulls a cart, the force that causes him to move forward is

the force the ground exerts on his feet

A year is the time needed for...

the sun to drift completely around the sun

An object moving in a circle at a constant speed is accelerated

toward the center of the circle

The prefix micro stands for

1/1,000,000

A snail travels 45cm in 20min. Its average speed is (note convert min to hours)

135 cm/h

A bicycle travels 12km in 40 min. Its average speed (in km/hour) is

18

Relative to what she weighs on the earth, an astronaut visiting another planet

Any of the choices, depending on the planet

According to Aristotle, what element was below water?

Earth

When first proposed, a scientific idea is usually called a...

Hypothesis

A planet not visible to the naked eye is...

Neptune

Which would change mass substantially?

None of these

Who is largely responsible for the philosophy of idealism?

Plato

The object in the sky that apparently moves least in the course of times is...

Polaris

Your body most easily "feels" acceleration

True

Can someone take 4 steps and end up where they started?

Yes

The "scientific method" is

a continuing process

When an object is accelerated

a net force acts on it

Which statement about the pair of units is true

a yard is shorten than a m

Which of these best models Newton's first law

all of these

Newton's first law of motion implies

an object at rest will stay at rest unless something causes it to move

Which is not causing a force on a car?

cruise control