Pick and copy all the incorrect options for the following question:

A student plans an investigation to calculate the speeds of different balls as they roll down a ramp. Which piece of information is least necessary for the student to record?

Options:
- the size of each ball
- the thickness of the ramp
- the length of the ramp
- the time it takes the ball to travel



- the size of each ball





- the length of the ramp



- the time it takes the ball to travel

