SCI 104, Homework 3

less the gravitational force between them

According to Newton, the greater the distance between gravitationally interacting objects, the

greater the gravitational force between them

According to Newton, the greater the masses of interacting objects, the

Earth

An object is placed exactly halfway between the Earth and the Moon. The object will fall toward the

all of the above - it provided prediction and discovery of planets - its discovery prompted other laws of nature - planets aren't cubes with sharp corners

An outcome of universal gravitation is that

twice as much

Consider two planets in space that gravitationally attract each other. If the mass of one planet is doubled, and the distance between them doesn't change, then the force between them is

mass of the building attracts us upward slightly

Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

It is 1/9 of the initial force

How does the force of gravity between two bodies change when the distance between them is tripled?

Forget it; you can't travel far enough

How far must one travel to completely be beyond Earth's gravity?

decrease to one-half

If Earth's mass decreased to one-half its original mass with no change in radius, your weight would

also doubles

If Earth's mass somehow doubles with no change in its size, and your mass remains the same, your weight

that gravity is universal

Newton discovered

interplanetary forces

Perturbations of planets are due to

CAB

Rank the average gravitational forces from greatest to least between (a) the Sun and Mars, (b) the Sun and the Moon, and (c) the Sun and Earth. Rank from greatest to least. To rank items as equivalent, overlap them.

CBA

Rank the light that enters your eye from brightest to dimmest for these situations: (a) three candles seen from a distance of 3 m , (b) two candles seen from a distance of 2 m , and (c) one candle seen from a distance of 1 m . Rank from brightest to dimmest. To rank items as equivalent, overlap them.

the Moon has a larger acceleration than Earth, because it has a smaller mass

Ranking Task: Gravity and Newton's Laws part d

Two bodies attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them. F ~ m1m2/d2

State Newton's law of universal gravitation in words. Then express it in one equation.

gravitation

The Sun is spherical due to

Uranus

The planet Neptune was discovered by perturbations of

increases

Two objects move toward each other due to gravity. As the objects get closer and closer, the acceleration of each

500 N

What is the force of gravity on a 500-N woman standing on Earth's surface?

6.67 × 10−11 N

What is the magnitude of gravitational force between two 1−kg bodies that are 1 m apart?