physics (speed,velocity and acceleration)

What are the units for mass?

What is the formula for average speed?

What is the vertical axis in a distance-time graph?

What does a steep line correspond to in a distance-time graph?

How is velocity different from speed?

What is the formula for acceleration?

What is the vertical axis in a speed-time graph?

What does a downwards line correspond to in a speed-time graph?

What does the area beneath a velocity-time graph represent?

If a car increases in velocity from +5 m/s to +15 m/s in three seconds, what is its acceleration?