Easy Physics

Easy Physics Physics is not difficult...it is the explanations that are not simple enough.

30/07/2024

Why do things not move by themselves but remain stationary?
99% of students would answer, because there is no force being applied.

Let's find out;
A force is applied to change the position of an object, but in reality, force is only a medium in which force is transferred from one object or one location to another.

When a force is applied on an object, energy is being transferred from one body to the other body that is stationary, thus, the energy transferred automatically changes its form to another form of energy causing the object to start moving and change its position.

When a force is applied by transferring energy to another object it causes the object to change its position by moving a distance, hence we say work has been done. So it can also be seen that work is done when energy is converted from one form to another.

Lastly, the time it takes for a force to cause an object to move a distance, or the time it takes for energy to be converted from one form to another is referred to as power.

In conclusion, a force is only required to transfer energy from one object to another, it is energy that is required by an object in order to be in motion and change position.

To answer the question:

In reality an object does not move but remains stationary because it does not posses any energy to do so.

Energy transfer requires Newtons laws.

Application of Newtons laws on elevators.
21/07/2024

Application of Newtons laws on elevators.

A simple summary of inclined planes.
21/07/2024

A simple summary of inclined planes.

Last year's results for Muaina Seconday School.
21/07/2024

Last year's results for Muaina Seconday School.

17/07/2024

1: Force

What is a force?

• When you are trying to change the position of something by moving it you normally say “Push” it there or “Pull” it there.

• In other words, when you want to change the position of something you are either going to push it or pull it.

• When you are pushing or pulling on something you are actually applying what is called a force on that something to change its position.

Therefore, we can simply define a force as;

 A force is a push or a pull on an object.

• A force is basically responsible for motion (movement).

I know you are all familiar with the word motion, but what do you think motion is and how do you define it?

• In physics, motion is basically defined as a change in position. When something changes position it is said to be in motion or moving.

But you should ask yourselves;

 How do things change position or how do things start moving, do they just start moving, do they vanish from one place and appear in another, do you tell a desk to move to the other end of the room or a plate of food to come to you?...

• Everything does not just change position or start moving, when something changes its position and is in motion it does so because of the presence of a force.

• If you want to move something you will either push it or pull it. In other words you are applying a force on that object in order to change its position or move it.

• When a force is applied on an object that is stationary (not moving) the object will start to move or if a force is applied to an object that is moving, the object will speed up (accelerate) or slow down (decelerate).

• Therefore, we can conclude that in order for something to start moving, speed up or slow down a force must be applied.

 Force causes motion or movement.

• Force is measured using an instrument called a spring balance or a dynamometer

• The SI unit for force is the Newton (N). Named after

Inertia:-it is the laziness of a body to change its initial state of motion.- it is the tendency of a body to continue w...
15/07/2024

Inertia:

-it is the laziness of a body to change its initial state of motion.

- it is the tendency of a body to continue with its initial state of motion.

14/07/2024

What is a negatron?

14/07/2024

Every object undergoes two possible motions in time respectively, never both at the same time, it is either at rest or in motion.

If it is at rest it automatically obeys Newtons first law of motion.
- 0 acceleration
- All forces in equilibrium, only two forces are acting.

If it is in motion, then;
1. It is moving with uniform velocity, it also obeys Newtons first law of motion.
- 0 acceleration
- All forces in equilibrium, four forces are acting

2. It is moving with non uniform velocity, it does not obey Newtons first law of motion.
- it is accelerating
- it is decelerating
- forces are not in equilibrium, there exist a non zero positive net force.

Only an object that is at rest or moving with uniform velocity obeys Newtons first law of motion.
- 0 acceleration
- All forces in equilibrium

14/07/2024

A simple acronym to remember the electromagnetic spectrum, in order of longest wavelength and lowest frequency to shortest wavelength and highest frequency.

Revising. = Radio waves
Mathematics. = Microwaves
Increases. = Infrared
Valuable. = Visual light
Understanding = Ultraviolet
for
Xcellent. = X-ray
Grades. = Gamma radiation

12/07/2024

Physics is the study of the universe, everything in it, and how they work.

-r.sotto-

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