There are two forces acting on the teacher:
Force due to weight/gravity (Fg)
Force due to drag (Fd), which is a resistance opposite to the direction of motion. Think of an airplane flying through the sky: there will be air that tries to oppose the plane's direction of motion AKA air-resistance.
The force of gravity is always downward (the direction of gravity).
Like we said before, the force of drag is always opposite to the direction of motion. Since the teacher is falling down, the force of drag is exerted upward.
Look at the attached diagram. The teacher is the circle in the middle. The two arrows indicate the two forces and their directions.
Now let's look at numbers:
Fg = mg = 65kg * 9.81 m/s^2 = ??N
Fd = 320N
To find the "Net Force" we must add up all of the forces exerted on the teacher, BUT we have to take into account the direction of forces.
Let's define downward as our "positive" direction. Since downward is positive, that means our force due to gravity is positive = +Fg
But since our force due to drag is UPWARD that means our force is NEGATIVE = -Fd.
So our total net force is
Answer:
Chemical Property
Explanation:
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.
Answer:
Explanation will be answer.
Explanation:
Democritus thought if he cut something in half over and over again, it would stop at some point. He said that this last piece of material couldn't be cut smaller. Democritus called these little pieces of atoms of matter, which means "indivisible". He believed that atoms last forever, never change, and could not be destroyed. Democritus believed that there was nothing between atoms and that everything around us could be explained if we could understand how atoms work.
The plum pudding model is one of many historical and scientific models of the atom. The model was first proposed by JJ Thomson in 1904, shortly after the discovery of the electron but before the discovery of the atomic nucleus, and tried to explain two properties of the atoms known at the time: that the electrons are negatively charged particles and the atoms are not. You have a net electric charge. The plum pudding model has electrons that are surrounded by a positively charged volume, like negatively charged "plums" that are embedded in a positively charged pudding.
In 1920 Ernest Rutherford imagined the possible existence of the neutron. In particular, Rutherford examined the inequality between the atomic number of an atom and its atomic mass. His explanation for this was the existence of a neutrally charged particle in the atomic nucleus. He viewed the neutron as a double neutral conductor made up of an electron orbiting a proton.
Answer:
A=1.0.34 m
Explanation:
Given that
f= 1 s
x= 1 m
v = 1.72 m/s
We know that angular frequency ω is given as
ω = 2 π f
Now by putting the values in the above equation
ω = 2 π x 1
ω= 2 π rad/s
The velocity v is given as
A=Amplitude
A=1.0.34 m
It can't. Acceleration IS a change in velocity.