E-Sewaka Dharma Award

E-Sewaka Dharma Award
E-Sewaka Dharma Award

Force

7:43 PM / Diposkan oleh Mandela Agatha / komentar (0)




A force is a push or a pull. It is also a vector; It has size and direction. There are three common forces.

  1. Contact force is a force applied by touching.
  2. Gravity is the force of attraction between two masses.
  3. Friction is the force that resists motion between two surfaces pressed together.
Balance Force


These humans in the pictures give 2N It is balance force.
Balance force is the net force that acting on a object is 0

Unbalance Force


These humans in the pictures give 2N In the left picture, it is unbalance force.
Unbalance force is the net force that acting on a object isn’t zero

Touch Force


We called touch force
because we give force with touch the object
The picture shows the touch force from the cue ball
(Note. The cue ball didn’t show here)

Untouch (Field) Force


We called untouch force
because we give a force without touch the object
For example :
  • Weight
  • Magnetic





Label:

Pulleys

7:36 PM / Diposkan oleh Mandela Agatha / komentar (0)


FIXED PULLEY

A fixed or class 1 pulley has a fixed axle. That is, the axle is "fixed" or anchored in place. A fixed pulley is used to change the direction of the force on a rope (called a belt). A fixed pulley has a mechanical advantage of 1.
The total weight on this pulley is 1,0 N


-------------------------------------------------------------------------------------------------



MOVABLE PULLEY

A movable or class 2 pulleys has a free axle. That is, the axle is "free" to move in space. A movable pulley is used to multiply forces. A movable pulley has a mechanical advantage of 2. That is, if one end of the rope is anchored, pulling on the other end of the rope will apply a doubled force to the object attached to the pulley.
The weight of the object is 1 N
The weight of the pulley is 0.3 N
The total weight of this pulley is 1 + 0.3 = 1.3/2
= 0.65 N = 0.7 N


------------------------------------------------------------------------------------------------------------------


COMPOUND PULLEY

A compound pulley is a combination of a fixed and a movable pulley system. Compound pulley has a mechanical advantage according as many as the pulley. And for this pulley the mechanical advantage is 3.
The weight of the object is 1.5 N
The weight of the pulley is 0.3 + 0.8 = 1.1
The total weight of this pulley is
1.5 + 1.1 = 2.6 / 3
= 0.866 N
= 0.87 N

-------------------------------------------------------------------------------------------------

Label:
Subscribe to: Posts (Atom)