GRAVITY: WEIGHT VS. MASS

The law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

• It describes the electromagnetic force between charged particles.

• It states that energy cannot be created or destroyed.

• It explains the behavior of gases under different conditions.

• It states that every point mass attracts every other point mass with a force proportional to their masses and inversely proportional to the square of the distance between them.

According to the law of universal gravitation, what happens to the force of gravity as the mass of the objects increases?

• It decreases

• It increases

• It remains the same

Fill in the blank: The force of gravity increases as the distance between the objects _________.

• decreases

• increases

• remains constant

• doubles

What is the value of acceleration due to gravity on Earth?

• 9.8 m/s²

• 10 m/s²

• 8.9 m/s²

• 9.5 m/s²

A feather falls slower than a bowling ball on Earth because:

• a feather is lighter than a bowling ball

• air resistance affects the feather more than the bowling ball

• gravity does not act on the feather

• the feather is made of different material

The difference between mass and weight is:

• Mass is the amount of matter in an object, while weight is the force of gravity on an object.

• Mass is measured in newtons, while weight is measured in kilograms.

• Mass changes with location, while weight remains constant.

• Mass and weight are the same and can be used interchangeably.

Mass is a measurement of the amount of ______ in an object.

• matter

• energy

• force

• volume

Weight is the force of gravity exerted on an object, usually by the ______.

• Earth

• Moon

• Sun

• Mars

According to Newton's second law of motion, which formula represents the relationship between force, mass, and acceleration?

• F = ma

• F = mg

• F = mv

Your weight changes when you travel to the Moon, but your mass does not because:

• The gravitational force on the Moon is different from that on Earth.

• Your mass is dependent on your location.

• The Moon has a different atmosphere.

• Your weight is constant everywhere.