Motion Speed Velocity and Acceleration Point of Reference

Point of Reference • The object or point from which movement is determined •

• Motion is a change in position relative to a point of reference

• Speed has two units of measure, one for distance and one for

Speed that does not change is constant speed

Speeding up • On a distance over time graph • Increase of speed (speeding

Average speed • Total distance divided by the total time • Formula: • Total

Velocity • Speed in a given direction • Velocities in the same direction combine

Interesting fact • Rockets are launched in the same direction of the earth’s rotation

Questions • What is motion? • What is speed? How is it calculated? •

Questions • How is velocity different from speed? • Which two factors determine an

• Acceleration is a change in velocity • Three ways to accelerate: •

Acceleration due to gravity • • • 9. 8 m/s 2 Every second the

Special name for negative acceleration • A decrease in velocity is deceleration or negative

Object at rest (stationary or not moving) Object moving at a constant velocity (speed)

Questions • What is acceleration? • What is the shape of a distance-time graph

Ticket out the Door 1. During the video, Fred Flintstone’s car begins to move,

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Motion Speed, Velocity, and Acceleration

Point of Reference • The object or point from which movement is determined • Movement is relative to an object that appears stationary • Earth is the most common point of reference. Also called frame of reference.

• Motion is a change in position relative to a point of reference • Speed is the distance traveled divided by the amount of time it took to travel that distance • Speed = distance • time

• Speed has two units of measure, one for distance and one for time. • Examples: • meters/second (m/sec) • kilometers/hour (km/hr) • Miles per hour (mi/hr)

Speed that does not change is constant speed

Speeding up • On a distance over time graph • Increase of speed (speeding up) will result in a curved line

Average speed • Total distance divided by the total time • Formula: • Total distance total time

Velocity • Speed in a given direction • Velocities in the same direction combine by adding • Velocities in different directions combine by subtracting

Interesting fact • Rockets are launched in the same direction of the earth’s rotation to get an extra boost of 1800 km/hr to its speed

Questions • What is motion? • What is speed? How is it calculated? • What is average speed?

Questions • How is velocity different from speed? • Which two factors determine an object’s velocity?

• Acceleration is a change in velocity • Three ways to accelerate: • Speed up • Slow down • Change direction • Acceleration has three units of measurement: distance / time • Examples: • m/sec ( m/sec 2 )

Acceleration due to gravity • • • 9. 8 m/s 2 Every second the object is traveling 9. 8 m/s faster than the previous second Symbol is g

Special name for negative acceleration • A decrease in velocity is deceleration or negative acceleration

Constant Acceleration

Object at rest (stationary or not moving) Object moving at a constant velocity (speed) Continuously going at the same speed Object speeding up (accelerating) Going faster as time goes by

Questions • What is acceleration? • What is the shape of a distance-time graph for acceleration?

Ticket out the Door 1. During the video, Fred Flintstone’s car begins to move, stops, and then moves again. 2. Graph Fred’s motion on a distance over time graph. 3. Graph Fred’s motion on a separate velocity over time graph. 4. Include a title and all necessary labels for full credit.