The velocity of an object in free fall increases downwards with time
- Please find attached the correct graph showing velocity as a function time, with the positive direction to be upwards.
Reason:
The known parameters are;
Location where the rocks are released; Earth
The time at which rock Y is released = A few seconds after rock X is released.
Required:
To select the graph that shows the vertical velocity of rock, <em>x</em>, as a function of time.
Solution:
Let <em>t </em>represent the time after which rock x are released, with the positive direction being upwards, we have;
- The equation for the velocity of x is v = -9.81·t
With the above equation, the graph of the vertical velocity of rock x is plotted with MS Excel.
Learn more about the graphs of velocity of object in free fall here:
