Read the following statements and decide whether they belong in evidence or reasoning.
Since air resistance is negligible the horizontal velocity of the car is constant.
The car was launched from four heights.
Horizontal and vertical displacement were measured with a meterstick.
When launched from 0.5 cm the time in the the air was 0.3 s.
Because the initial vertical velocity is zero, the equation y= 1/2at2 can be used to calculate the time.
The ball was launched three times from this height and the horizontal displacement was 0.3 m, 0.28 m, and 0.29 m.
The calculated time was plotted against the average horizontal displacement and a best fit linear curve was applied.