Basics of Physics: Exploring Gravity

What is the acceleration due to gravity if an object falls from a height of 25m?

• 98 m/s/s

• 25 m/s/s

• 250 m/s/s

• 9.81 m/s/s

The greater the mass of an object, the greater its force due to gravity.

• True

• False

Under zero G conditions, such as in an orbiting satellite, a person seems _____.

• weightless

• the same weight as on earth

• mass-less

• heavier than on earth

The mass of an object on Earth ____ the mass of the same object on the moon.

• is greater than

• is less than

• is almost equal to

• is the same as

Einstein explained gravity as the idea that large masses can ____.

• create black holes

• warp the space around them

• create comets

• pull apart gravity

An object will weigh more on ____.

• Jupiter

• the moon

• Mars

• Earth

Gravity is best described as the attractive force ____.

• that does not exist in space

• that acts between any two objects

• that acts between magnets and iron

• that does not affect orbiting satellites

What keeps the planets orbiting around the Sun?

• inertia

• the heat from the Sun

• the weightless environment

• gravity

The force of gravity between two objects depends on _____.

• the masses of the objects only

• the masses of the objects and their distance from one another

• the masses of the objects and the acceleration of the two objects

• the masses of the objects and the speeds they are traveling

If a feather and a hammer fell to the ground from the same height in a vacuum, ______.

• the feather would land first

• they would land at the same time

• they would both float in the vacuum

• the hammer would land first