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Physics 20 > Unit 1 - Kinematics > Flashcards

Unit 1 - Kinematics Flashcards

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1
Q

To find the magnitude of R. Use which equation to solve?

A

Pythagorean Theorem
Rt/\2 = Rx/\2 + Ry/\2

A2 + B2 = C2

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2
Q

What are components

A

Perpendicular parts into which a vector can be separated (X and Y)

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3
Q

After finding the magnitude of Rt, you may find the angle of Rt using which equations?

A

Trigonomic Equation.

Sine / Cosine / Tangent

SOH CAH TOA

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4
Q

What are the two ways to express the resultant vector’s magnitude?

A

The Polar Coordinates Method

The Navigator Method

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5
Q

What is Relative Motion?

A

Motion measured with respect to an observer

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6
Q

What is ground velocity?

A

Velocity relative to an observer on the ground

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7
Q

What is air velocity?

A

An objects velocity relative to still air

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8
Q

What is wind velocity?

A

Velocity of the wind relative to the ground

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9
Q

What is Trajectory?

A

The parabolic motion of a projectile

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10
Q

What is Range?

A

The distance a projectile travels horizontally over level ground

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11
Q

Collinear vectors lie along which line?

A

The same straight line

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12
Q

Non-collinear vectors are along which line?

A

Not along the same straight line

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13
Q

What is a Scalar quantity?

A

Scalar quantities consist of a number and a unit.

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14
Q

What is a vector quantity?

A

A vector quantity consists of a number, a unit and a direction

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15
Q

What is Distance?

A

The length of a path taken to travel from one position to another

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16
Q

What is position?

A

The straight line distance from the orgin to the object’s location

17
Q

What is displacement?

A

The change in position

18
Q

What does a position time graph look like for an object at rest

A

A straight line with zero slope

19
Q

What does a position time graph look like for an object moving at a constant velocity?

A

A straight line with a non zero slope

20
Q

The greater the slope of a position time graph..

A

The faster the object is moving

21
Q

What does the slope of a velocity time graph represent?

A

Acceleration

22
Q

What does a velocity time graph look like for an object experiencing uniform motion?

A

A horizontal line.

23
Q

What does a position time graph look like for an object undergoing uniformly accelerated motion?

A

A curve

24
Q

What does a velocity time graph look like for an object undergoing uniformly accelerated motion?

A

A straight line with a non zero slope.

25
Q

What does an acceleration time graph look like for an object undergoing uniformly accelerated motion?

A

A horizontal line

26
Q

What does the slope of the tangent give you on a position time curve?

A

Instantaneous velocity

27
Q

What does the area under a velocity time graph represent?

A

Displacement

28
Q

What is a representation of the average velocity on a position time graph?

A

Total displacement divided by time elapsed

29
Q

When solving kinematics equations, how do you choose the correct equation?

A

Choose the equation that contains all the given variables in the problem as well as the unknown variable.

30
Q

At maximum height, what is a projectiles verticals velocity?

A

Zero

31
Q

The time taken for an object to reach maximum height is equal to what?

A

Equals the time taken to fall back down to the original height.

32
Q

How do we add vectors in two dimensions?

A

Draw a scale diagram. Or resolve them into their components and use trigonometry to to find the resultant.

33
Q

How do we solve relative motion problems?

A

Use trigonometry, with ground velocity as the resultant. If the vectors are not perpendicular, resolve them into their components first.

34
Q

What is the shape of a projectiles trajectory?

A

A parabola

35
Q

How do we solve projectile problems in two dimensions?

A

Resolve them into their horizontal and vertical components. Then use kinematics equations. The time taken to travel horizontally equals the time taken to travel vertically.

Physics 20 (2 decks)

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