Describing Motion

Question 1

What does speed, distance, and time mean

Answer 1

Speed - how fast an object is moving measured in Meters per second (m/s)

Distance - total length traveled by an object measured in metres (m)

Time - measures the duration of an event measured in seconds (s)

Question 2

What does velocity and displacement mean

Answer 2

Velocity - velocity is speed and direction

Displacement - is the change in position of an object measured in metres (m)

Question 3

What does acceleration mean

Answer 3

Acceleration - is an increase or decrease in speed and change in direction, and is measured in metres per second squared (m/s2)

Question 4

What is the speed of sound

Answer 4

About 330 m/s

Question 5

recall typical values of speed for a person: walking, running and cycling.

Answer 5

Walking - 1.4 m/s
Running - 3 m/s
Cycling - 6 m/s

Question 6

make measurements of distance and time and then calculate speeds of objects

Answer 6

Measure Distance - Use a ruler, measuring tape, or GPS for larger distances.

Measure Time - Use a stopwatch or any time-keeping device

Question 7

Speed, distance, time equations

Answer 7

Distance
______________
Speed x time

Question 8

calculate average speed for non-uniform motion

Answer 8

Average speed is calculated by dividing the total distance traveled by the total time taken, regardless of changes in speed during the journey.

Example:

Segment 1: 50 km in 1 hour.
Segment 2: 70 km in 2 hours.

Total Distance = 50 km + 70 km = 120 km
Total Time = 1 hr + 2 hr = 3 hr
Average Speed = Total Distance / Total Time = 120 km /3 hr = 40 km/hr

Question 9

Examples of vector and scalars

Answer 9

Vectors - acceleration, displacement, weight, velocity, force

Scalars - distance, speed, volume, mass

Question 10

Acceleration, change in velocity, and time equations

Answer 10

Change in velocity
___________________
Acceleration x time