A student compared the speeds at which a large and a small marble rolled down an inclined plane. In order to make the findings more reliable, the student should
release the marbles at different heights. repeat the experiment several times. tilt the plane at different angles. use two marbles that are the same size.
Question: A student compared the speeds at which a large and a small marble rolled down an inclined plane. In order to make the findings more reliable, the student should
A. release the marbles at different heights.
B. repeat the experiment several times.
C. tilt the plane at different angles.
D. use two marbles that are the same size.
Answer: