Motion Flashcards
What is the displacement during a 500 mile long NASCAR race? Assume the start and finish lines are in the same place.
0m
Displacement is measured from the starting point to the ending point.
How many meters are in a kilometer?
1000
kilo- in the metric system means 1000
What is the distance during a 500 mile long NASCAR race? Assume the start and finish lines are in the same place.
500 miles
Distance is the total amount travelled.
If I walk one mile north, two miles east, one mile south, and four miles west what is my displacement?
2 miles (West)
What is the difference between instantaneous speed and average speed.
Instantaneous speed is the actual speed at any given time, average speed is the average speed over a given time.
What does the slope of a distance time graph represent?
Velocity
Distance over time can be interpreted as distance divided by time which is velocity.
What does the slope in a velocity over time graph represent?
Acceleration
What does a horizontal line in a distance over time graph represent?
An object at rest.
What does a horizontal line in a velocity over time graph represent?
A constant velocity.
What three controls on your car will cause the car to accelerate?
Gas Pedal- Positive acceleration
Brake- Negative Acceleration
Steering Wheel- Changing Directions
How are velocity and acceleration related to each other?
Acceleration is a change in velocity.
What is the difference between speed and acceleration?
Acceleration is a change in speed.
What is the difference between speed and velocity?
Velocity has a unit of direction, speed does not.
Explain why you would move at a constant speed on a merry go round, but not at a constant velocity.
Speed does not have an element of direction so as long as the merry go round is rotating at the same rate you will move at a constant speed. Since you are moving in a circle you will always be accelerating.
What type of motion is experienced by a free-falling object?
Constant acceleration
Average acceleration due to gravity on Earth is 9.8m/s2
