Unit 1 - Kinematics

Question 1

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

Answer 1

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

A2 + B2 = C2

Question 2

What are components

Answer 2

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

Question 3

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

Answer 3

Trigonomic Equation.

Sine / Cosine / Tangent

SOH CAH TOA

Question 4

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

Answer 4

The Polar Coordinates Method

The Navigator Method

Question 5

What is Relative Motion?

Answer 5

Motion measured with respect to an observer

Question 6

What is ground velocity?

Answer 6

Velocity relative to an observer on the ground

Question 7

What is air velocity?

Answer 7

An objects velocity relative to still air

Question 8

What is wind velocity?

Answer 8

Velocity of the wind relative to the ground

Question 9

What is Trajectory?

Answer 9

The parabolic motion of a projectile

Question 10

What is Range?

Answer 10

The distance a projectile travels horizontally over level ground

Question 11

Collinear vectors lie along which line?

Answer 11

The same straight line

Question 12

Non-collinear vectors are along which line?

Answer 12

Not along the same straight line

Question 13

What is a Scalar quantity?

Answer 13

Scalar quantities consist of a number and a unit.

Question 14

What is a vector quantity?

Answer 14

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

Question 15

What is Distance?

Answer 15

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

Question 16

What is position?

Answer 16

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

Question 17

What is displacement?

Answer 17

The change in position

Question 18

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

Answer 18

A straight line with zero slope

Question 19

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

Answer 19

A straight line with a non zero slope

Question 20

The greater the slope of a position time graph..

Answer 20

The faster the object is moving

Question 21

What does the slope of a velocity time graph represent?

Answer 21

Acceleration

Question 22

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

Answer 22

A horizontal line.

Question 23

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

Answer 23

A curve

Question 24

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

Answer 24

A straight line with a non zero slope.

Question 25

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

Answer 25

A horizontal line

Question 26

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

Answer 26

Instantaneous velocity

Question 27

What does the area under a velocity time graph represent?

Answer 27

Displacement

Question 28

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

Answer 28

Total displacement divided by time elapsed

Question 29

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

Answer 29

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

Question 30

At maximum height, what is a projectiles verticals velocity?

Answer 30

Zero

Question 31

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

Answer 31

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

Question 32

How do we add vectors in two dimensions?

Answer 32

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

Question 33

How do we solve relative motion problems?

Answer 33

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

Question 34

What is the shape of a projectiles trajectory?

Answer 34

A parabola

Question 35

How do we solve projectile problems in two dimensions?

Answer 35

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.