Distance: is a measure of how far an object is. The basic SI Unit of measurement of distance is meters (m). It can be measured by kilometers (Km), Centimeter (cm) or millimeters (mm).
1 kilometer = 1000 meter
1 meter = 100 centimeter
1 meter=1000 millimeters
Displacement: It is distance moved in given direction. The unit is (m)
Measuring speed
Speed: Is the rate of change of distance moved in unit time. The unit ( m/s ).
It is scaler quantity. ( Doesn't have direction )
If an object moves, its average speed can be determined by dividing distance by the time taken.
Velocity: Is the rate of change of distance in unit time in given direction. The unit is ( m/s ).
Measuring Acceleration
Acceleratin: Is the change of velocity in unit time. The unit is meter per scond square.
It can be caculated by dividing change in velocity by the time taken for change.
Positive value for acceleration it means velocity incraeses, while negative values means velocity decreasing.
The acceleration of an object requires a force.
According to newton's second law, the ralationship between the mass and acceleration.
EXAMPLE:-
If car has mass of 200kg with acceleraton of 10 meter per scond square, the force pushing the car can be caculated by using
F = m * a
F = 200 kg * 10 m/s2
F = 2000 N
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