Velocity
What is the equation for velocity?
v=d/t
What are the two equations for accelration?
a=(delta v)/(t)
a=(vf-vi)/(t)
What does a straight, horizontal line mean on a position vs time graph?
The object is stationary.
What does a straight horizontal line mean on a velocity vs time graph?
The object is moving at a constant velocity.
How many meters are in 5 km?
5000 m
What are the units of velocity?
m/s
What are the units for acceleration?
m/s^2
What does the slope of a position vs time graph represent?
Velocity (m/s)
What does the slope of a velocity vs time graph represent?
Acceleration (m/s^2)
How many seconds are in 3 hours?
10,800s
A sound wave travels 1029m in 3 seconds. What is the velocity?
343m/s
A train starts at rest and accelerates for 5 seconds. It's final velocity is 3m/s. What is the acceleration?
0.6 m/s^2
How do you find the displacement on a position vs time graph?
Subtract the final position from the initial position. How far away from the start they finish.
How do you find the displacement on a velocity vs time graph?
Find the area under the curve. All of the areas above the x-axis added up and subtract any areas under the x-axis.
How many seconds are in 3 years and 16 days?
95,990,400s
A plane flies 235 km in 17 minutes. What is the velocity in m/s?
230.39 m/s
A car starts at rest and accelerates at 3m/s^2 for 12 seconds. What is the final velocity?
36 m/s^2
What does it mean when you cross the x-axis on a position vs time graph?
You walk past the point of measurement. You are walking at a velocity in the negative direction.
What does it mean when the graph crosses over the x-axis on a velocity vs time graph?
The object changes direction. The object slows to a stop, then begins to accelerate in the opposite direction.
What is 14 km/h in m/s?
3.89 m/s
A car drives 90 km in 2 hours and 35 minutes. What is the velocity in m/s?
9.68 m/s
A driver steps on the breaks for 3.23 seconds and the car comes to a complete stop. The acceleration of the car is -10.37m/s^2. What is the cars initial velocity?
33.5m/s
Describe a situation that would create a position vs time graph like this.
Moves in positive direction, then stays still, moves in the negative direction, past where it started, then stays still, Then begins to walk back to where it started.
Describe a situation that would create this velocity vs time graph.
An object accelerates in the positive direction, then moves at a constant velocity, then begins to slow down to a stop, then turns and accelerates in the opposite direction, then moves at a constant velocity, then begins to slow down to a stop again.
A car travels at 60mph. How fast is it going in m/s? (1mile=1609m)
26.82 m/s