Answer:
To calculate the mechanical advantage of a pulley you simply have to count the number of rope sections that support whatever object you are lifting (not counting the rope that is attached to the effort)
Example:
For example, in a one pulley system the MA is 1. In a two pulley system the MA is 2. The more compound the pulley is the easier the load is to lift. If you were lifting a 600kg object with 2 pulleys you would have to use enough effort to pull 300kg to lift the 600kg object! Therefore your mechanical advantage would be 2 (600/300).
MA= load/effort OR number of rope sections
Answer:
moving or tending to move toward a center.
Explanation:
the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation a string on the end of which a stone is whirled about exerts centripetal force on the stone — compare centrifugal force.
Answer:
Explanation:
r = Distance between Earth and Sun = 
Time taken to complete one rotation around Sun is given by
Centripetal acceleration is given by
The centripetal acceleration of the Earth in its orbit is
Force is given by
The force on the Earth is
When atoms that are shaking with kinetic energy collide with the dust particles, it causes the dust particles to move with the Brownian motion.
Hope this helps ;)
