True/False.
Speed can be shown on a graph of time versus distance.
False.
100
Define velocity.
Velocity is the speed of an object in a particular direction.
100
When does an object accelerate?
When the speed, direction, or both change.
100
If you a bowlingball and a baseball from the same height on the roof of a house, which will land first?
Neither, they will land at the same time.
100
True/False.
As the speed of a falling object increases, the air resistance decreases.
False.
200
What is the formula to finding average speed?
Total distance divided by the total amount of time.
200
Five cars leave a house at the same time, going the the the same speed for 12 miles. Why wasnt the velocitys the same?
They were going different directions.
200
What is it called when there is an increase in velocity and a decrease in velocity?
Positive acceleration, and negative acceleration and/or deacceleration.
200
What is the rate at which all objects accelerate to earth?
9.8m/s/s.
200
Will air resistance have more effect on the acceleration of a falling leaf or the acceleration of a falling acorn?
Falling leaf.
300
What is the definition of speed?
Speed is the distance trveled by an object divided by the time taken to travel that distance.
300
A train is going 75m/h and a person in the train is walking towards the front going 2m/h. What is the resultant velocity?
77m/h.
300
True/False.
Acceleration is shown on a graph of velocity versus time.
True.
300
If a ping-pongball falls from a height of 24.5 meters, what is its final downward velocity?
29.4.
300
What is it called when there is no air resistance, and where would it occur?
Freefall, and it occurs in space and a vacuum.
400
What is the average speed of when the distance is 120 miles and was traveled in 5 hours?
24m/h.
400
What is it called when you add the speed of a plane and the speed of a person walking in the plane?
Combining velocity.
400
What is the scientific definition for acceleration?
The rate of which velocity changes.
400
What is the formula for change in velocity (give full meaning for letters)?
The formula is v=g x t. V is velocity g is acceleration due to gravity on earth, and t is time it takes to fall in seconds.
400
Fill in the Blanks.
The net force of a falling object is equal to the force of ___ __________ subtracted from the force of _______.
The net force of a falling ob ject is equal to the force of AIR RESISTANCE subtracted from the force of GRAVITY.
500
What is th amount of time it took if the average speed was 325m/h and the total distance was 1300 miles?
4 hours.
500
What does velocity have that speed doesn't?
A reference point.
500
Define centripetral acceleration, and give an example that can be commonly found at an amusement park.
The acceleration that occurs in a circular motion, example at amusment park would be a ferris wheel.
500
What was Aristotle and Galileos beliefs in falling objects?
What was Aristotle and Galileos beliefs in falling objects?
Aristotle believed that the heavier object would land first.
Galileo sad that the mass did not affect which one landed first.
500
When the net force is 0 N and the object stops accelerating, what is the constant velocity at which it falls called?