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Science > Physics - force > Flashcards

Physics - force Flashcards

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1
Q

L1 - Introduction to Force

Define a Force:

A

A force refers to a push, pull or twist resulting from an interaction from 2 different objects

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2
Q

L1 - Introduction to Force

how can an object exert a force?

A

An object cannot excert a force itself or have a force inside of it, the force of the object can ONLY be obtained by interacting with something outside of itself.

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3
Q

L1 - Introduction to Force

Define an Agent:

A

An agent refers to the object or person that excerts the force

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4
Q

L1 - Introduction to Force

Define a Reciever:

A

A reciever refers to the object or person that experiences the force

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5
Q

L1 - Introduction to Force

What may the reciever do?

A

The recieve may do one or more of the following:
1. change its shape
2. begin to move
3. speed up
4. slow down
5. stop moving
5. change the direction in which it is moving
6. balance the effects of another force acting on the same object

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6
Q

L1 - Introduction to Force

How is force measured?

A

Force is measured in Newtons (N)

(N = unit of force)

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7
Q

L1 - Introduction to Force

How do you illustrate Force?

A

To show a force in a diagram use an arrow to show:
1. Direction - durection of arrow = direction of force
2. Lengths - length of arrrow = size of force
3. lables - arrows are labelled to show agent and reciever
4. Colour coding - same colours = same objects force

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8
Q

L1 - Introduction to Force

What are the 2 types of forces?

A
  1. Contact forces
  2. Non-contact Forces
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9
Q

L1 - Introduction to Force

Identify all the types of Contact Forces:

A
  1. Normal Force
  2. Applied Force
  3. Friction
  4. Air Resistance
  5. Tention
  6. Spring
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10
Q

L1 - Introduction to Force

Identify all the types of Non-Contact Forces:

A
  1. Gravitational Force
  2. Magnetic Force
  3. Electrical Force
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11
Q

L1 - Introduction to Force

When can Normal Force exist?

A

Normal force can only exist when an object is in contact with a surface.
It acts perpendicular to the surface and opposes the object’s weight or any other force pressing it against the surface.

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12
Q

L1 - Introduction to Force

What are all the acronyms for each force type?

A
  1. Normal Force (Fn)
  2. Applied Force (Fapplied)
  3. Friction(Ff)
  4. Air Resistance (Fair)
  5. Tention (Ft/T)
  6. Spring (Fs)
  7. Gravitational Force (Fg)
  8. Magnetic Force (Fm)
  9. Electrical Force (Fe/Felec)
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13
Q

L1 - Introduction to Force

Define Net Force (FNet):

A

Net Force refers to the sum of all forced acted on the same object

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14
Q

L2 - Newtons 1st Law

What is Newtons First Law?

A

Newtons First Law is:
An object will remain at rest or travel at a constant speed in a straight line unless it is acted apon by an unbalenced force.

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15
Q

L2 - Newtons 1st Law

Define Inertia:

A

Inertia refers to a property of matter that keeps something in the same position or moving in the same direction unless acted apon by an external force

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16
Q

L3 - Newtons 2nd Law

What is Newtons 2nd Law?

A

Newtons 3rd Law is:
An object acted apon by a force experiences acceleration in the same direction and proportional to the magnitude (size) of the net force, and intersely proportional to the mass of the object

In other words:
net force acting on an object = mass of object X acceleration
(FNet = m X a)

17
Q

L4 - Newtons 3rd Law

What is Newtons 3rd Law?

A

Newtons third law is:
whenever one object excerts force on a second object, the second object excerts an equal force in the opposite direction.

18
Q

L5 - Demostrating Newtons laws

Identify the equation for acceleration:

A
  1. a = change in velocity/change in time
    OR
  2. a = Net Force/Mass
19
Q

L5 - Demostrating Newtons laws

Identify the equation for velocity:

A
20
Q

L5 - Demostrating Newtons laws

Identify the equation for displacement:

A
21
Q

L5 - Demostrating Newtons laws

Identify a position-time graph/displacement-time graph:
(axis/use)

A
22
Q

L5 - Demostrating Newtons laws

Define the Independent Variable and how to find it:

A

The factor that is purposely changed or manipulated by the experimenter.

Ask, “What am I changing in the experiment?”

23
Q

L5 - Demostrating Newtons laws

Define the Dependant Variable and how to find it:

A

The factor that is measured or observed; it responds to changes in the independent variable.

Ask, “What am I measuring in the experiment?”

24
Q

L5 - Demostrating Newtons laws

Define the Controlled Variable and how to find it:

A

The factor(s) that stay the same in an experiment to ensure a fair test.

Look for the things that don’t change during the experiment.

Science (4 decks)

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