Spring Semester Final (Review)

Which statement describes velocity?

• 30 m/s

• 30 m East

• 30 m/s East

• 30 m

What is the difference between speed and velocity?

• Velocity is the change over time; while speed is the change in velocity over time.

• Velocity has a specific direction associated with it while speed has no specific direction

• Velocity has no direction associated with it while speed has a specific direction attached to it.

The forces acting on an object that do not change an object's motion or cause no motion are called:

• unbalanced forces

• balanced forces

• net forces

• terminal forces

An object at rest or in motion will remain that way until acted upon by an unbalanced force. This is Newton’s -

• First Law

• Second Law

• Third Law

• Gravity Law

Which situation best explains the law of force and acceleration (Newton’s Second Law)? (Force = Mass X Acceleration)

• restraints keep passengers from falling out of a roller coaster when it travels upside down

• a larger force will be required to accelerate a roller coaster car with more people

• Riders must be certain heights so they have enough mass to ride the roller coaster

Which is NOT a component of galaxies?

• Universe

• Stars

• Nebulae

• Planets

Which shape does NOT describe a type of galaxy?

• Spiral

• Elliptical

• Circular

• Irregular

The Sun is classified as a main sequence star. This indicates the Sun is -

• at the center of our galaxy

• a medium - sized star

• a star fueled by hydrogen

• a massive star

Scientists use light years as a measurement of distance in space. A light year is a specific distance in space. It is the distance light travels in -

• from the Sun to the edge of our Solar System

• in one year

• from the Sun to the edge of our galaxy

• from the Sun to Earth

Which would represent Newton’s Law of Action-Reaction?

• toy car rolling down a ramp

• toy rocket being launched

• toy boat floating in the water

• toy tractor being pushed over a hill