Only first royal picture from me could change your whole environment share this.

Circular motion

Hello this is again study with calmness, be happy to reach your purpose.

What to remember:

1.V=D/t

2.Where V=2π/t 

2π2π
 θ= Displacement
1 cycle = 360Degree = 2πRad

1Rad =180Degree/π = 57.3 Degree (optional)

RPM (revolutionperminunte): rad/s * 2π/60
Rad/s: RPM*60/2π

Omega=W (speed on circular motion)


Centripetal acceleration = V^2/r
Centripetal force = m*a(centripetal acceleration)

MIU=(Friction value)

V=√MIU*g*r  

R=Radius
g=Gravity
 When the velocity is bigger than the given velocity needed to pass through a turn. When it is 
smaller than the velocity given, the object could do the turn.

The other material is on satellite


To find the force =

Thankyou hope you could easily understand this topic ^^

 Projectile Motion

Hello this is an easy way to understand the projectile motion.

Things to remember:

1. Vt= Vo+at

2. A=Vt-Vo/time

3. S=Vot-1/2*a*t^2

4. Vt^2=Vo^2+2*AS

In Projectile motion there must be gravity acting on this motion as it is going in reverse of the gravity.

So,

1.Vt= Vo+g*t

2.S= Vot-1/2*g*t^2

3. Vt^2=Vo^2+2*gS

In projectile motion there must be an angle, speed, time and distance on the motion.

1.At the X axis/Range

Velocity of X will always be the same till it reach the ground.

But remember to count the angle of this motion.

E.g Angle: 60 Degree, Initial Speed(Vo): 10m/s

Vox = Cos60 * 10= 5m/s

Because the velocity of x is always the same so,

Vox=Vx

To determine the range it's just like counting distance on speed formula

X(range)=Vox*t

V=Vox+at

X(range)=Vox*t-1/2*g*t

This one is for the Y(height) it is abit different to count the components of Y because in different height the speed will change by the time it is going.

So,

1.At the Y axis/Range

Velocity of Y is always different as it has the effect of gravity.

E.g Angle: 30 Degree, Initial Speed(Vo): 10m/s

Voy = Sin30 * 10= 5 m/s

Because the velocity of y is not always the same so,

Vy = Voy-g*t

To determine the height is just like this,

Y=Voy-1/2*g*t^2

Time on Maximum height: TMaxHeight (TMH)=Voy/g

Maximum height: Voy^2/2g

Time on Maximum range: TMH*2

Maximum Range: Vox*Time on Maximum Range

Calm down this is easy ^^ Keep up your smile

This is Magnitude and direction of velocity at certain time (we've found out the elements with several shown formulas)

V=

Wish you to be happy, keep calm, never lose hope, do good deeds, smile, don't talk trash and you will be happy Thankyou ^_^ 

Linear motion

Hello guys i'm Jonathan and i will describe things that i've learned at school especially on physics.

Quantities:

Distance

Displacement

Speed

Velocity

Acceleration

Average value of velocity and acceleration

Instantaneous of velocity and acceleration

Equation of linear motion

Equation 1 : Equation related between initial velocity, final velocity, acceleration and distance. There is no time factor in it.

Equation 2 : Relation between distance travelled, initial velocity, acceleration and time.

Equation 3 : Relation between initial velocity, final velocity, acceleration and distance. There is no time factor in it.

Initial velocity : Vo

Final velocity : Vt

Time : T

Acceleration : A

Change of velocity : Vt-Vo

Equation 1 comes from,

The rate of change of velocity or the acceleration

A=(Vt-Vo)/t    atau

Vt=Vo+at

Equation 2 comes from,

Displacement = average velocity * time = [(vo+v1)/2]*t

Vt=vo+at

Substituting for vt, we get D

D=[(vo+vo+at)/2]*t

= vot+at^2/2

D=Vot+at^2/2

Equation 3 comes from,

vt=vo+at

Squaring, we get

Vt^2=(Vo+at)^2 = Vo^2+ 2Voat+a^2 t^2

=Vo^2+2a(Vot+at^2/2)

Vt^2=Vo^2+2ad

Falling object ( if going up gravitation will be -10 M/S^2)

Vt=vo+gt 

D=Vot+gt^2/2

Vt^2=Vo^2+2gs

e.g

A car

Vo/speeding at : 30m/s

acceleration : (-5)m/s^2

Vt/it will stop : 0m/s

Find how long it will cross more if the line of traffic light is 88 M ahead

0^2=30^2+ 2*((-5)*D

0= 900 + (-10)*D

10 D = 900

D=90M

90M-88M= 2 Meter

A car

Vo/speeding : 10m/s

Vt/it will stop : 30m/s

Time taken : 10 seconds

Distance ; ?

Acceleration : ?

Find acceleration and then find the distance.

Acceleration : 30-10/10 = 2 m/s^2

Distance = o*10+2*10^2/2

=0+ 100

=100 Meter

Thank you ^^

Hello I'm JowJow what a good situation is in this country, hope for the best. Learn, learn and keep learning.

I have learned vector in simple parts that was taught by Mr.Galuh.

›Scalar quantities

›Vector quantities

      Geometrically, the dot product of two vectors is the magnitude of one times the projection of the second onto the first. (scalar product)

*Scalar means no direction.

     

      Geometrically, the cross product of two vectors is the area of the parallelogram between them.(vector product)

*Vector means there is direction.

The right hand rule for cross multiplication relates the direction of the two vectors with the direction of their product. Since cross multiplication is not commutative, the order of operations is important.

1.Hold your right hand flat with your thumb perpendicular to your fingers. Do not bend your thumb at anytime.

2. Point your fingers in the direction of the first vector.

3. Orient your palm so that when you fold your fingers they point in the direction of the second vector.

4. Your thumb is now pointing in the direction of the cross product.

Dot product example(A=1i,5j,16k) (B=2i,6j,17k)

1i.5j.16k * 2i.6j.17k = 2i + 30j + 272 = 304

Cross product example (A=1i,2j,2k) (B=1i,2j,3k)

AxB = o , 2k , -3j = (2k-2k, -3j-2j, 6i-4i) = 0k, -5j, 2i

           -2k, 0, 6i

           -2j,-4i, 0

BxA = 0, 2k, -4j  = (2k-2k, -4i-6i, -4j-3j)

           -2k, 0, -4i

           -3j, -6i, 0

First, find the x, y
1st X, cos 30 * 20 = 1/2 √(3  * 20 = (?)
2n X cos 60 * 40 = 1 * 40 = 40

Hellow i'm Jonathan, i am going to tell you guys about my physic lesson activity in this blog, Anyone who needs help with their life could comment in this blog ;v... ^_^ Okay let's start...

Measurements, significant figure, and Dimension

I've learned about how to use vernier caliper, micrometer, how to count precision and uncertainty, to know the significant figures and to get the dimensions of several units. This is how,

Vernier caliper

Micrometer

Precision and uncertainty of vernier caliper

Smallest scale :1 mm

Precision         : 1/2 * 1 mm = 0.05 mm

Uncertainty     : 1/2 * 1 mm = 0.05 mm

Precision and uncertainty of micrometer screw

Smallest scale : 0.1 mm

Precision         : 1/2 * 0.1 mm = 0.005 mm

Uncertainty     : 1/2 * 0.1 mm = 0.005 mm

Significant figure 

There are three rules on determining how many significant figures are in a number:

• Non-zero digits are always significant.
• Any zeros between two significant digits are significant.
• A final zero or trailing zeros in the decimal portion ONLY are significant.

How do we know and where these dimension comes from?

We could conclude that we use the rules of indices where, e.g Velocity = Distance/time 

So, Velocity = [L] / [T] = [L] [T]-1