practical methods

Question 1

a ball is rolled off a table with horizontal velocity v, and travels horizontal distance x before hitting the floor; describe an experiment to test the relationship between v and x; suggest what this relationship should be

Answer 1

roll ball off bench; use light gate to measure v; use metre rule to measure x; repeat for different v; plot graph of x vs v; v stays constant during fall so x = vt; t (fall time) is same for every trial so x proportional to v; so graph should be straight line through origin