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Chapter 3 Vocab
Question | Answer |
---|---|
The force that attracts a body toward the center of the earth, or toward any other physical body having mass | gravity |
The resistance that one surface or object encounters when moving over another. | friction or sliding friction |
Mass times velocity | Momentum |
The force between two bodies in contact that RESISTS the initial motion of one running over the other. | static friction |
F=ma | Newton's 2nd law of motion |
Which law explains inertia? | Newton's 1st law of motion |
Opposes the motion of objects that move through the air | air resistance |
To every action force there is an equal and opposite reaction force. | Newton's third law of motion |
The gravitational pull on an object | weight |
How much matter is in an object. | mass |
When gravity and air resistance equal out and the falling object reaches a top speed. | terminal velocity |
A snowball going down a hill is an example of which type of friction? | Rolling |
Which law explains why a baseball accelerates faster than a volleyball if both thrown with the same force? | Newton's 2nd Law of motion |
When you lean against the wall, the wall pushes back on you. What law explains this? | Newton's 3rd law of motion |
The ___________________ of an object is different on other planets in the solar system. | gravity |
_____________________ relates the net force exerted on an object to its mass and acceleration. | Newton's 2nd law of motion |
The type of friction where a force is being applied but the object is not moving. | Static friction |
The type of friction where a force is being applied and the object is moving along the surface of another | Sliding friction |
mass x gravity | Weight |
Which law states that forces come in pairs? | Newton's 3rd law of motion |
An object in motion stays in motion and an object at rest stays at rest, unless acted upon by an outside force. | Newton's 1st law of motion |
Momentum cannot be created nor destroyed, but can be transferred from one object to another. | Law of conservation of momentum |
SI unit of Force | Newtons |
SI unit of mass | kilograms |
SI unit of time | seconds |
SI unit of acceleration | m/s/s |
SI unit of weight | Newtons |
SI unit of speed | m/s |
SI unit of distance | meters |
SI unit of momentum | kg x m/s |