28. PART 1: Caleb is investigating the effect of friction on the motion of an
object. He uses the following supplies for the investigation:
1. a wooden block
2. three ramps, each ramp is the same height and length but
has a different surface (smooth wood, carpet, rough
sandpaper)
3. a stopwatch
Caleb tests his hypothesis that the smooth wood ramp surface
causes less friction than the carpet and that the carpet causes less
friction than the rough sandpaper.
A. Describe a procedure using these supplies that Caleb may
follow to test his hypothesis.

the independent variable, or the one that is intentionally manipulated is the speed.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

+15-35=-20

going in opposite directions

answercollision;