What two units of measure are necessary for describing speed

How well does the extrapolated value (the slope of the trend line) agree with the accepted value of free-fall acceleration (g = 9.8 m/s2)?

Avoltage source vs = 10 v is in series with a resistor of 10 kohm. if the source transformation theorem is applied, what will the value of the current source be in ma ?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity