Question

Students wanted to find out if an empty barrel would roll down a ramp faster than one filled with sand. For their results to be valid, they should further ensure all of these, EXCEPT ONE. Which one need they NOT ensure?
A
That the barrels used are identical (when empty).
B
That the ramps used are identical.

C
That the barrels are released simultaneously.
D
That the barrels are released from the same point.

Answer 1

Answer:

Students wanted to find out if an empty barrel would roll down a ramp faster than one filled with sand. For their results to be valid, they should further ensure all of these, EXCEPT ONE. Which one need they NOT ensure?

A

That the barrels used are identical (when empty).

B

That the ramps used are identical.

C

That the barrels are released simultaneously.

D

That the barrels are released from the same point.

Answer 2

Answer:

Umm i think c

Explanation: