The Falling Apple & Falling Moon
______ hypothesized that Earth's gravity reaches to apples on a tree and to the Moon.
What is Sir Isaac Newton?
If Earth's mass hypothetically reduces to half with no change in its size, your weight _____.
What is decreases?
Light from a candle has a certain brightness 1m away. At 4m away its brightness is ____ as much.
What is 1/16?
When Chelsea is inside a freely falling elevator she has _______.
What is no weight?
Centripetal force does no work on a circularly moving object because ______.
What is it has no component of force in the direction of motion?
The Moon does fall, but it falls around Earth due to its _______________. So, it doesn't fall towards Earth like apples do.
What is tangential motion?
Two planets in space gravitationally attract each other. If the masses of both planets are doubled, with no change in distance between them, gravitational force is ______.
What is four times as much?
What is less?
The weight of an object is defined to be the force ____.
What is exerted against a supporting surface?
The trajectory of a projectile that accelerates in only the vertical direction while moving at a constant horizontal velocity is called a ________
Newton's great achievemnt was _________ terrestrial and cosmic laws.
What is synthesizing? (to combine)
When the separation distance between a pair of stars becomes twice their usual distance the force between them decreases by _________.
What is one-quarter (1/4)?
If the earth's size somehow increased with no change in mass, your weight would ____.
What is decrease?
Phil stands on his bathroom scale that reads 500N. After he gently lifts one foot, the scale reads ____.
What is 500N?
The curved path of a projectile is a combinatin of _____.
What is constant horizontal motion and accelerated downward motion?
If the tangental velocity of the Moon about Earth slowed to zero, the Moon would ______.
What is crash into Earth?
If the Earth were twice as massive, its pull on the Moon and Sun would be ______.
What is doubled?
If the masses of two planetary bodies doubles, and the distance between them decreases by half, the force between them would be ____.
What is unchanged?
A "weightless" astronaut in an orbiting space vehicle is without a _________ force.
What is support?
The tangential velocity of an Earth satellite in circular orbit is its velocity _______.
What is parallel to Earth's surface?
The velocity of something being tangential means that its motion is ____.
What is along or parallel to its path?
According to Newton, the heavier a body, the _____ it is attracted to Earth.
What is more?
Earth's gravitation acts on all the apples on an apple tree. Some apples are twice as far from the ground. Assuming all apples have the same mass, the twice as high apples have _____.
What is practically the same weight?
In the absence of a supporting surface, when you step off a high step or in a free fall you experience ______.
What is weightlessness?
As a golf ball falls after rolling off the edge of a table, its vertical component of motion ____.
What is increases?