For Art class, Social Studies class, English class, American History class,
or Photography class, Shani has done an incredible amount of work.
She'll tell her parents all about it at dinner, and her arms will really ache
when she gets up tomorrow morning.
But it's a different story in Physics class. In Physics, there is a formal definition
for "work". (That's so it can be measured, and numerically compared to all forms
of energy.)
The scientific definition of work is
(force exerted) times (distance moved) .
With this definition, if the force doesn't move through a distance,
then the work done is zero.
Anything you do without moving, even if it's holding a small car over
your head for an hour while your muscles tremble and sweat pours
down, represents no "work" in the scientific sense.
First we calculate the acceleration of the cart:
a = (v₂ - v₁) / (t)
a = (7 m/s - 3 m/s) / (8 s)
a = 4 m/s / 8 s
a = 0.5 m/s²
Using the Newtons Second Law:
F = m×a
F = (10 kg)(0.5 m/s²)
F = 5 N
<h2>The correct option is C</h2>
Well, some sounds come from instruments or it could be part of a certain practiced natural sound made by the human body. It can help define what the culture is by the certain sounds that are affiliated with. It shows that those sounds come from those specific people.
1. The wavelength is the ratio of the wave's speed to its frequency in hertz or 1/s. This is shown below,
λ = s / f = (320 m/s) / (300 1/s) = 1.07 m
The wavelength is approximately 1.07 m.
