A
How is speed different from velocity?
Velocity needs a direction
What is the velocity of an object that is moving 6 meters in 2 seconds east?
3 m/s east
What is the formula for acceleration?
Acceleration = Final Velocity - Initial Velocity / change in time with a direction
What is the formula for speed?
Speed= Distance/Time
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
An object travels 25 meters in 2 seconds east. What is it's velocity?
12.5 m/s east (must include direction!)
What are three ways we can tell if something is accelerating?
speeding up slowing down changing direction
What is the formula for velocity?
Velocity = Distance / Time with a direction
What is the average speed of a cow that walks east 60 meters in 90 seconds? (Remember, the units must be m/s or km/hr)
.7 m/s
A train travels 120 km in 2 hours and 30 minutes. What is its average speed?
S=120 km/150 min= .8km/min
A car traveling at 15 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is its acceleration?
A= 15 - 0/10 =1.5m/s^2
Which of our formulas must have a direction in order to be complete?
Velocity
What is the speed of an object moving east for 6 seconds at 105.3 m/s?
105.3 m/s
What is km/hr squared, south.. a possible unit for?
Acceleration
Final Velocity = 50 m/s south Initial Velocity = 60 m/s south Time to change velocity = 5 seconds What is the acceleration of this object?
-2 m/s squared, south
For what formula would decimeters/hour east be a possible unit?
Velocity