The velocity of an object in free fall increases downwards with time
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;
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:
The angle of elevation of the ground is the angle between the ground and the line of sight
The angle of elevation of the ground is 30.46 degrees
<h3>How to calculate the angle of elevation</h3>The angle of elevation is calculated using the following tangent ratio
Evaluate the quotient
Take the arc tan of both sides
Using a calculator, we have:
= 30.46
Hence, the angle of elevation of the ground to the nearest tenth of a degree is 30.46 degrees
Read more about elevation and distance at: