The Laws of Motion and The Formation of Planets (Lecture Slides 2-3) Flashcards Preview

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Flashcards in The Laws of Motion and The Formation of Planets (Lecture Slides 2-3) Deck (10)
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1
Q

Speed

A

Rate at which an object moves (i.e. distance traveled in a given time)

2
Q

Velocity

A

An object’s speed in a certain direction (ex: 10 m/s moving east)

3
Q

Acceleration

A

A change in object’s velocity. A change in either speed or direction is an acceleration.
(A car is accelerating when its velocity is increasing, when its velocity is decreasing/negative acceleration, and when its changing directions even though its speed stays constant)

4
Q

Momentum

A

The (mass x velocity) of an object

5
Q

Force

A

Anything that can cause a change in an object’s momentum.

6
Q

What is gravity and the equation for gravity?

A

Gravity is a force that acts between any two masses. Equation: Fg = G (M1M2/d2)

7
Q

How do mass and distance affect the gravitational attraction between objects?

A

If mass increases, the force of gravity increases. If distance increases, the force of gravity decreases.

8
Q

Mass

A

The amount of matter in an object (a man’s mass doesn’t change between Earth and the Moon)

9
Q

Weight

A

A measurement of the force which acts upon an object (a man’s weight decreases on the Moon because there is less gravity).

10
Q

Describe the acceleration of gravity.

A

Forces cause masses to accelerate. As objects fall, they accelerate because of the force of gravity. The higher you drop the a ball, the greater its velocity when it lands.