Based on the law of conservation of energy, which statement is false?
a.
energy is lost when machines don't work right,
b. we can't add more energy to the universe.
c. we can't destroy energy that exists in the universe.
d.
energy changes from one form to another.

A

A. Energy is lost when machines don't work right.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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.