Speed
Velocity
Hodge Podge
What formula would this go with?
Questions about Graphs
100
What is the formula for speed?
Speed = Distance / Time
100
What is the formula for velocity?
Velocity = Distance(displacement) / Time with a direction
100
Change in state of matter is a __________ change. (chemical or physical?)
physical change
100
What formula is m/s an example unit?
speed or average speed
100
What can we find with a distance vs time graph?
average speed of an object
200
How is speed different from velocity?
velocity needs a direction
200
What is the velocity of an object that is moving 6 meters in 2 seconds east?
3 m/s east
200
How can we tell if an object is accelerating? Name the 3 ways.
speeding up (increasing speed) slowing down (decelerating) changing direction (turning)
200
What is km/hr South a possible unit for?
Velocity
200
What goes on the x axis (on both graphs discussed in class)?
x-axis = time on both the distance vs. time AND the speed vs. time graphs!
300
Name units often used for expressing speed.
miles/hours (mi/hr), meters/second (m/s), kilometers/hour (km/hr)
300
Distance = 20 meters Time = 4 seconds Direction = south What is the velocity of this object?
5 m/s south
300
Can an object accelerate if it is moving at a constant speed?
yes, it can change direction (ex: carousel moving at a constant speed)
300
Which of our formulas must have a direction in order to be complete?
velocity
300
What does an angled line on a distance vs. time graph indicate about an object?
It's moving at a constant speed.
400
A porcupine moved toward a pond at a speed of 5 m/s. It took him 8 seconds. What was the distance he traveled?
40 meters
400
An object travels 25 meters in 2 seconds east. What is it's velocity?
12.5 m/s east (must include direction!)
400
Name the 5 evidences of a chemical reaction.
Color Change, Temperature Change, Gas Produced, Light Produced, Solid Precipitate Formed
400
Name units often used for expressing velocity.
Km/hr, m/s, mi/hr - with a direction! Must have a direction with unit!
400
What does a horizontal line in a distance vs. time graph indicate?
The object is at rest (no movement)
500
What is the speed of an object moving east for 6 seconds at 105.3 m/s?
105.3 m/s
500
Calculate the velocity of a mountain climber if that climber is moving northeast at a pace of 3 km in 1.5 hours?
2 km/hr northeast
500
What is the rate of change in velocity?
acceleration
500
How many seconds will it take for a satellite to travel 450 km at a rate of 120 m/s? What formula would you use to solve this problem?
Time = distance / speed
500
What does a horizontal line on an speed vs. time graph indicate?
The object is traveling at a same (constant) velocity.
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