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CHAPTER 14 - Coggle Diagram
CHAPTER 14
Effects of forces
Change motion of an object
Move a stationary object
change direction in which an object is moving
change speed of a moving object
stop a moving object
Change size or shape of an object
Applying force to knead a lump of plasticine, the shape would change
spped is the distance travelled per unit time
Turning effect of forces on an object
example : lever
type of forces
contact force
whenever an object is touched, contact force acts on it
contact force that acts on two materials rubbing against each other is called friction
how friction can be useful in daily lives
writing on paper
walking
non-contact force
force that acts on an object without touching it
Examples include gravitational force, electrostatic force and magnetic force
instrument for measuring force
Compression spring balance
Extension spring balance
Pressure
Amount of force acting perpendicularly on a unit area
Factors affecting pressure
Pressure and area
Pressure and force
Mass and weight
Force of gravity(weight) is different on different massive objects
Weight of person on earth is greater than weight on the moon due to the stronger gravity on earth.
Pressure in everyday life
example : Hammer a nail