Minggu, 27 November 2016

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 ^^

Minggu, 13 November 2016

 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 ^_^