Unit 1 Test

Question 1

Vectors

Answer 1

Quantities defined by a magnitude and direction.

Question 2

Examples of Vectors

Answer 2

Displacement, velocity, acceleration, and force.

Question 3

Scalars

Answer 3

Quantities defined by a magnitude. (no direction)

Question 4

Examples of Scalars

Answer 4

Distance, speed, time, and energy.

Question 5

Distance

Answer 5

The total length traveled by an object from one point to another.

Question 6

Displacement

Answer 6

It tells us where an object is relative to a chosen point. It includes the straight-line distance between the two points AND the direction the line points in.

Question 7

Speed

Answer 7

A scalar quantity which describes how fast an object is moving. (v=d/t)

Question 8

Velocity

Answer 8

A vector value which describes how fast an object is moving, and in what direction it is moving. (v=d/t)

Question 9

Instantaneous Velocity

Answer 9

The velocity at an instant in time.

Question 10

Average Velocity

Answer 10

The average velocity over a period of time. (v=Δx/Δt)

Question 11

What are the parts of a Velocity vs. Time graph?

Answer 11

Y-axis: Velocity (m/s)
X-axis: Time (s)
Y-intL Initial Velocity
Slope: acceleration (m/s^2)

Question 12

If acceleration is constant, what kind of line is Velocity?

Answer 12

Straight line

Question 13

If acceleration changes, what kind of line is Velocity?

Answer 13

Curved line

Question 14

What does the Area under a Velocity graph give us?

Answer 14

The displacement

Question 15

What is acceleration?

Answer 15

The rate of change in velocity. (a=Δv/Δt)

Question 16

What is the slope of a Displacement vs. Time graph?

Answer 16

Velocity

Question 17

If velocity is constant, what kind of line is Displacement?

Answer 17

Straight line

Question 18

If velocity is not constant, what kind of line is Displacement?

Answer 18

Curved line.

Question 19

What does the area under a Displacement vs. Time Graph give us?

Answer 19

Nothing (think m x s = ms)

Question 20

What do horizontal lines on an Acceleration vs. Time graph tell us?

Answer 20

They tell us there is a constant velocity.

Question 21

What does the area under an Acceleration vs. Time graph give us?

Answer 21

Total change is velocity.

Question 22

Acceleration

Answer 22

A vector quantity that tells us the rate of change of velocity.

Question 23

What is gravity?

Answer 23

g=9.81m/s^2

Question 24

What is Free Fall?

Answer 24

Falling object where only the gravitational force is acting on the object.

Question 25

What is the acceleration of the Vertical and Horizontal components of Projectile Motion?

Answer 25

Vertical Component: acceleration of g
Horizontal Component: no acceleration

Question 26

Do vertical and horizontal component affect each other?

Answer 26

No, they are INDEPENDENT.

Question 27

For an object launched at an angle, what Is its Vertical initial Velocity?

Answer 27

vertical component of initial velocity = u sin Θ

Question 28

For an object launched at an angle, what Is its Horitzontal initial Velocity?

Answer 28

horizontal component of initial velocity = u cos Θ

Question 29

What is the displacement equation for x?

Answer 29

x=utcosΘ

Question 30

What is the displacement equation for y?

Answer 30

y=utsinΘ-1/2gt^2