Four separate experiments were performed to compare the friction of different objects with gravity, One experiment used an ice cube. Another experiment used a rock. The third used an eraser, and the last used a wood
block. Each object is placed at one end of a plastic tray. The end of the tray is lifted slowly. A metric ruler is used
to measure the height of the raised end of the tray at which each object begins to slide,
Identify one similarity between the four experiments,
The friction of the four objects are dissimitat:
B)
The objects started to slide at different heights,
An ice cube, a rock, an eraser, and a wood block were used,
D)
A metric ruler was used to measure the height of the tray