A change in speed or direction (change in velocity per unit of time)
What is acceleration?
100
distance over speed * time or distance/speed*time
What is the formula for speed?
100
9 m/s (meters per second)
A baseball pitcher throws a pitch toward home plate, a distance of 45 meters, in 5 seconds. What is the Velocity of her pitch?
100
A. Positive
B. Negative
C. Increasing
D. Zero
Constant means- Same Speed
A constant Velocity means acceleration is ......?
Constant means what?
200
distance over time :) (distance/time)
What is the formula for Velocity?
200
a=v - v/ t
A: velocity, V: Final time, -: subtraction, V: Initial time, and T: time !
What is the formula for calculating acceleration?
200
True or False? False
Is there always one correct frame of refrence in a given situation?
200
TRUE!
Motion must be measured relative to a refrence point. Is this True or False?
200
A. Yard
B. Foot
C. Meter
D. Mile
The basic SI unit of lenght is the ..... ?
300
Velocity is speed going in a specific direction, and Speed is the distance traveled by an object for a unit of time.
How is Velocity different from Speed?
300
acceleration is decreasing/slowing down.
What is deceleration mean?
300
distance traveled by an object for a unit of time.
What is speed?
300
TRUE!
Do Accerleration and Deceleration occur with change in Velocity?
300
Speed and Direction
Velocity describes both ________ and ________ of an object.
400
speed, direction, and time
What are possible units for Velocity?
400
Increasing Velocity (positive acceleration): increase in velocity (speed up)
Decreasing Velocity (negative acceleration): Decrease in velocity
Changing Direction: velocity involves both speed and direction. Object can accelerate even if speed is constant.
What are the 3 types of acceleration and describe all 3 of them?
400
Constant speed: objects do not travel
Average speed: total distance traveled, divided by the time passed
What is difference between constant speed and average speed?
400
5 km/hr
A car travels 250 km west in 5 hrs. What was the average speed of the car?
400
A. Speeds up
B. Slows Down
C. Changes Direction
D. All of the above
An object accelerates if it .....?
500
Straight line: Speeding up constantly
Curved line: Slowing down
Horizontal line: Speed is decreasing (stoping)
What does a straight line on a graph mean? What does a curved line represent? What does a horizontal line mean?
500
Meters per Second
What is a unit for acceleration?
500
average speed= total distance/ total time
What is an example of speed?
500
20 m/s2
A car starting at rest reaches Velocity of 100 m/s in 5 seconds. What was the acceleration of the car?