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FORCES AND PRESSURE natalie - Coggle Diagram
FORCES AND PRESSURE
natalie
Frictional force
2 objects
physical contact with each other
acts in the opposite directions
opposes motion of an object
increases
object is on
rough surface :check:
smooth surface :red_cross:
ADVANTAGES
Daily activities
Writing
Holding on to objects
enables
iron nails
hold objects together
Slowing down / stopping objects
Moving across rough surface
A force
A force is a push or pull acting on an object
SI unit
newton (N)
force is measured
spring balance
dynamometer
Effects of a force :
Changes
shape of an object
size of an object
direction of a moving object
speed of a moving object
Stop a moving object
Make a stationary object moving
2 types of forces
Contact
A force that results when two interacting objects are in direct contact with each other.
Non-contact
A force applied to an object by another object that is not in direct contact with it.
E.g.
Typing on a keyboard
Push
Scraping dirt from a wall
Push
Posting a letter through a letterbox
Push
Opening a drawer
Pull
Lifting a box from the ground
Pull
Mass and weight
DIFFERENCES
Definition
mass
Mass is the amount of matter in an object.
weight
Weight is the size of gravitational force acting on an object.
SI Unit
mass
Kilogram (kg)
weight
Newton (N)
Measuring Tool
mass
Beam balance
electronic balance
weight
Spring balance
Consistency
mass
remains unchanged
in different locations
weight
varies
in different locations
Gravitational force
Magnetic force