Forces causes objects to slow down, speed up or stay in one place.
TYPES OF FORCES:
TYPES OF FORCES:
1. PUSH AND PULL
2. MAGNETISM
It is a non-contact force.
Magnets have 2 poles: North and South. The Earth is like a big magnet.
Remember!!
It is a non-contact force.
Magnets have 2 poles: North and South. The Earth is like a big magnet.
Remember!!
3. UPTHRUST
Upthrust is a force that pushes things up. Things float in water because of upthrust. This force is opposite to Gravity.
Upthrust and Archimedes principle
If you try to lift up a weight in a swimming pool and then try to lift the same weight on the edge of the pool, it feels much lighter in the water.
This was supposed to have been first explained by the Greek scientist Archimedes. He said that the water gives an upward force or upthrust on any object in it.
You can weigh an object in air and then in water and actually work out the upthrust, it is the difference between the two readings. For this reason the upthrust is often called the loss in weight of the object.
Archimedes principle states that:
This was supposed to have been first explained by the Greek scientist Archimedes. He said that the water gives an upward force or upthrust on any object in it.
You can weigh an object in air and then in water and actually work out the upthrust, it is the difference between the two readings. For this reason the upthrust is often called the loss in weight of the object.
Archimedes principle states that:
