The helicopter view in the figure below shows two people pulling on a stubborn mule. (Take F, = 136 N and F, = 79.0 N.) F
F
75.0°
60.0°
(a) Find the single force that is equivalent to the two forces shown.
magnitude
N
direction
º counterclockwise from the +x-axis
(b) Find the force a third person would have to exert on the mule to make the net force equal to zero.
magnitude
N
direction
• counterclockwise from the +x-axis
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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.

d) physical means can be used to separate the components of air.