A curveball has more than one measureable motion. How many does it have? (ignore spin)

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3 Motions
 forward,
left (or right),
down

Velocity - Speed in a particular direction

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C. Velocity - speed in a particular direction

Velocity & Direction
St. Mary's H.S.

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Ex) Joe drove 13 meters North East in 2 seconds

We can say that Joe has 3 velocities

V = 6.5 m/s N.E.

V = 5 m N/2 seconds =

2.5 m/s North

V = 12 m East/2seconds

= 6 m/s East

 

 

1. Velocity is always written with direction

 

Examples

• 5m/s east

 


• +5m/s

 

• 100 m/s downward

 

• -100 m/s

 

 

2. Equation: V = ∆d/∆t

 

 

For straight line motion:

v = distance/time and direction

 

 

 

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