Dynamics Flashcards

(17 cards)

1
Q

What is a force?

A

It’s a pull or push measured in newtons.

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2
Q

What are contact forces?

A

Where one objects exerts a force on another object when they touch each other.

ex) friction, applied, tension, normal

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3
Q

What are non-contact forces?

A

aka FIELDS
Its where two objects don’t need contact to exert a force on each other.

ex) gravity

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4
Q

What is Force of Friction

A

exists between two objects that are in motion or attempting to be in motion

always opposes motion

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5
Q

What is applied force

A

A push or pull resulting from a machine, human action etc.

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6
Q

What is tension

A

An applied force exerted by a rope or string etc.

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7
Q

What is normal force

A

A support force that acts perpendicular to a surface between objects in contact.

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8
Q

What is force of gravity?

A

An attractive force between all objects

we only do math for large masses

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9
Q

State newtons first law of motion

A

An object at rest stays at rest
An object in motion stays in motion
UNLESS acted upon by a NET FORCE

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10
Q

State two things about net force

A
  1. A NF is not required for an object to maintain a constant velocit
  2. If a net force exists, acceleration occurs.
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11
Q

What is the law of inertia

A

Its the ability to resist change or “keep doing what you’re doing”

All objects have inertia but larger objects have more

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12
Q

Describe weight

A
  • Its the force of gravitational attraction
    W= Fg = m*g

Weight changes throughout the universe depending on its location.

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13
Q

State Newtons second law of motion

A
  • If NF exists, the object will accelerate in the direction of the NF.
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14
Q

How does friction occur

A

When two objects move or try to move past each other small irregularities on the surface catch each other and create the coefficient of friction.

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15
Q

What is Kinetic friction

A

Its friction on a moving object

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16
Q

What is Static friction

A

Friction on a static object (attempt to move)