Forces: Speed .

Question 1

What is displacement?

Answer 1

• Distance that an object moves in a straight line, from the start to finish point.
• Must include the direction of the straight line.
• Magnitude and Size= Vector.

Question 2

What is speed?

Answer 2

• Distance the object travelled in a given time.

- Scalar.

Question 3

What is the equation?

Answer 3

• Speed= Distance/Time.
• Distance= Speed x Time.
  Time= Distance/Speed.

Question 4

What are some key speeds?

Answer 4

• Normal Walking Speed: 1.5 m/s.
• Running Speed: 3 m/s.
• Cycling Speed: 6 m/s.
• Depends on several factors: Age, Health, Terrain Conditions, Distance travelled.
• Car on Main Road: 13 m/s.
• Fast Train in UK: 50 m/s.
• Cruising Aeroplane: 250 m/s.
• Speed of Sound in air: 330 m/s.

SPEED OF A MOVING OBJECT IS RARLEY CONSTANT.