Physical Quantities and measurement Techniques
Measurement :
Length - Ruler
Volume - Rulers and Measuring Cylinder
Time - Clocks and Digital Timer
Scales Quantity:
Distance
Time
Speed
Mass
Temperature
Vector Quantity:
Energy
Force
weighed
Velocity.
Acceleration
Momentum
Electric Field Strength.
Gravitational field strength.
Motion
Speed is the distance travelled per unit time.
Average Speed is equal to total distance travelled over total time taken.
Distance - Time Graph :
Speed - Time Graph :
In Distance - Time Graph, The Gradient is the Speed.
In Speed Time Graph, the Gradient is the Acceleration.
In Speed -Time Graph, the Area under the line is the Distance.
Deceleration is negative Acceleration.
Mass and Weight
Mass is a measure of the in quantify of an object at rest relative to the observer.
Weight is a gravitational force on an object that has matter.
Gravitational For Field Strength is the force per unit mass.
Uniform acceleration is defined as an item traveling in a straight line with an increase in velocity at equal intervals of time.
Zero.
Distance.
Speed.
Zero.
Uniform acceleration may be seen in the free-falling of an item. Non-uniform acceleration occurs when an item accelerates at a constant rate but not at equal intervals of time.
7m/s^2
-4m/s^2