Question

PLEASE HELP! 5TH GRADE SCIENCE
Heather rolls a marble over sandpaper and then over a flat table. Which statement best describes the observations she made?

A. When the marble is pulled, the friction on the table is greater.
B. When the marble is pushed, the friction is greater on the sandpaper.
C. The amount of friction is about the same on both surfaces.
D. The force of gravity pulling the marble lessens the friction between the surfaces.

Answer 1

Answer:

B

Explanation:

because the sandpaper is rougher than the flat table.

Answer 2

Answer:

B

Explanation:

Sandpaper causes more friction as it has a rougher surface while in the other hand, A flat table causes less friction as the flat table has a smoother surface.