Question

a pendulum was constructed and two different materials were tested for the weight at the end of the pendulum string.

ball material	trial #	pendulum height (cm)	distance ball moves (m)	time for ball to move distance (s)
stainless steel (67.3 g)	2	6	0.96	5.00
stainless steel (67.3 g)	3	6	1.12	6.53
acrylic (10.1 g)	4	6	2.99	11.55
acrylic (10.1 g)	5	6	2.68	10.47
acrylic (10.1 g)	6	6	2.70	10.50

question: which variable in the experiment is kept constant?
o time for ball to move distance
o distance ball moves
o pendulum height
o ball material

Explanation:

By observing the table, the pendulum height is 6 cm for all trials. While time, distance, and ball material vary across trials.

Answer:

Pendulum height