Answer:
"A pendulum swinging back and forth" is an example of harmonic motion
X = Xo cos ω t
Explains the back and forth motion of the pendulum
Just remember
Voltage = current times resistance
current = voltage over resistance
Current = 9/3 = 3
KE = 1/2 mv^2 is the relationship betwee mass and kinetic energy
Work = (force) x (distance)
The work he did: Work = (700 N) x (4m) = 2,800 joules
The rate at which
he did it (power): Work/time = 2,800 joules/2 sec
= 1,400 joules/sec
= 1,400 watts
= 1.877... horsepower (rounded)
The stratosphere is the layer above the troposphere
