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Physics Gr.11 > Kinematics > Flashcards

Kinematics Flashcards

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0
Q

Scalars

A

Quantities that are specified but only a magnitude

Eg. 50kg, 40 years, 300mL

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1
Q

Vectors

A

Quantities that are specified by a magnitude (size) and direction

Eg. 8km (east), 30m (up)

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2
Q

Position

A

The location of an object relative to the reference point (where you are, melted to something)

Eg. Hikers are 8 km (east) of the ranger station

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3
Q

Distance

A

Is a measure of the path length without regard of direction

Eg. If you were to run one lap on a 300 m track what is your displacement and distance at the end?
- disp. 0m, dist. 300m

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4
Q

Speed

A

Rate of change of distance with time

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5
Q

Average speed

A

Is evaluated over an interval time

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6
Q

Instantaneous speed

A

Is evaluated at one point in time

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7
Q

Velocity

A

The rate of change of position or displacement with time (this requires a direction)

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8
Q

Interail frame of reference

A

When your frame of reference is not moving

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9
Q

Airspeed

A

Objects velocity relative to air

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10
Q

Windspeed

A

Airs velocity relative to the ground

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11
Q

Groundspeed

A

Objects velocity relative to the ground

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12
Q

Free fall

A

Any body following under the influence of gravity alone

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13
Q

Terminal velocity

A

As an object falls encounters air resistance. The amount of resistance increases as a speed increases. This causes a rate of acceleration to decrease. Eventually the resistance is so great that the object reaches a constant speed.

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14
Q

Acceleration of gravity

A

An object falling on earth in the absence of air resistance acceleration is 9.81 m/s^2

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15
Q

Projectile

A

Is an object thrown in the air and moving freely under the influence of gravity

16
Q

Four rules of projectiles

A
  1. Travel a parabolic trajectory because of the force of gravity
  2. No horizontal forces therefore the horizontal velocity of the projectile is constant
  3. Acceleration due to gravity is 9.81
  4. The horizontal motion is independent of the vertical motion

Physics Gr.11 (1 decks)

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