Speed & Velocity

Question 1

What is Displacement?

Answer 1

Displacement is a measurement of the change in position of a moving body; a straight line connecting the start and end points is specified in terms of length and direction.

Question 2

What is a gradient?

Answer 2

A gradient is a slope of a hill on a graph: rise/run

Question 3

What instantaneous speed?

Answer 3

The speed of an object at a particular moment.

Question 4

What is Precision?

Answer 4

How close measured values are to each other.

Question 5

What does Reaction Distance mean?

Answer 5

Distance moved while reacting to an emergency.

Question 6

What does reaction time mean?

Answer 6

The length of time it takes a driver to respond to a hazard.

Question 7

What is the meaning of Scalar Quantity?

Answer 7

A quantity, such as distance or time that has size, but no direction.

Question 8

What is speed?

Answer 8

Speed is the rate of change of distance.

Speed is a measure of how quickly something moves.

Question 9

What is Systematic Error?

Answer 9

Error that always differs by the same amount.

Question 10

What is a Vector quantity?

Answer 10

A vector quantity is a quantity, such a displacement or velocity, that has size and direction.

Question 11

What does the term Velocity mean?

Answer 11

The rate of which displacement changes. In other words, velocity is how displacement changes with time.

Question 12

What is the difference between Speed & Velocity?

Answer 12

Speed tells us how much ground is covered in a certain amount of time. Velocity is speed in a particular direction.

Question 13

What is the unit of velocity?

Answer 13

m/s

Meters per second

Question 14

Is velocity a vector?

Answer 14

Yes velocity is a vector because it has a magnitude and direction.

Question 15

What is a Vector?

Answer 15

A Vector is something that has a magnitude and direction.

Question 16

What does a distance time graph show?

Answer 16

A distance time graph shows how far an object travels as time progresses.

Question 17

What does a flat line on a graph represent?

Answer 17

The object is not moving. (Gradient is 0)

Question 18

What does a steep-slope indicate on a distance time graph?

Answer 18

A steep-slope indicates that the object covers greater distance then a line with a gentler slope.

Question 19

What are some examples of Scalars?

Answer 19

Mass, speed, energy, volume, distance, temperature

Question 20

What are some examples of Vectors?

Answer 20

Displacement, velocity, acceleration, momentum, force

Question 21

Acceleration is a change in Velocity. What is acceleration?

Answer 21

Acceleration is a change in Velocity. This means the speed changes or/and the direction of motion changes.

Question 22

How do you find acceleration?

Answer 22

change in velocity
Acceleration= ———————-
Time taken
Or

Acceleration = final velocity - initial velocity
——————–
Time taken

Or
A=v-u
—–
T

Question 23

How do you convert m/s to Kim/hr for speed?

Answer 23

To get km per hour you need to times the meters per second by 3.6

To get the meters per second you need to divided the km and hour by 3.6

Question 24

How do you find the average speed?

Answer 24

average speed=
distance
——————
Time

Question 25

What does distance mean?

Answer 25

A measurement of how far apart objects are.