An ultrasonic tracker is used to measure the position 
and the velocity 
of a ball with mass 
, which is dropped to fall freely (see the figure below). Data for the time, height and speed of the ball are collected and recorded in Table 1 below.
The set up of the experiment; position is measured with an ultrasonic tracker located above the ball
Based on the measured quantities, complete table 1 below with the potential energy 
, kinetic energy 
and total energy 
of the ball - add additional columns and calculate the values.
Plot the graphs of , and against the time on the same coordinate system. is the sum of the kinetic and potential energy of the ball.
Is energy conserved when the ball falls? Write down the finding.
What percentage of energy is lost when the ball bounces off the ground.
Table 1:
Note: Negative speed means that the direction of movement of the ball has changed.
.
