MASS VS WEIGHT
Newton’s Second Law
• The fundamental relation between the mass
and the weight is defined by Newton's Second
Law and can be expressed as
• F=ma
~where
• F = force (N)
• m = mass (kg)
• a = acceleration (m/s2)
What is Gravity? What is Weight?
• Gravity: a force of attraction between objects.
• Weight: Measure of the gravitational force on
an object.
The Differences Between Weight and
Mass
• Weight is related to mass, but they are NOT the SAME!
• Mass: is the amount of matter in an object.
• An objects mass does NOT CHANGE!
Weight
• Your weight depends on how much gravity is acting on you at
the moment; you'd weigh less on the moon than on Earth,
and in interstellar space you'd weigh almost nothing at all.
Mass
• Mass is often called as weight.
• Mass can be measured in both metric and customary
units.
• Kilogram, gram, and milligram are the metric units
whereas ounces and pounds are the customary units
• A balance is used to calculate the mass of an object.
Units of Weight and Mass
• Gravity is a force and weight is a measure of gravity.
• Weight can be measured in newton's (N)
• Mass is measured in kilogram (kg), grams (g), and milligrams
(mg).
• For example: on Earth, a 100 g object, such as an apple,
weighs about 1 N on Earth
Mass Vs. Weight Video!
• http://www.youtube.com/watch?v=1whMAIG
Nq7E&feature=share&list=PL5AB1C95419D8F
017
Create Mass Vs. Weight T-Chart!
• Turn to the next available page in your ENB.
• Title your heading Mas Vs. Weight
Let’s Try!
• http://www.explorelearning.com/index.cfm?
method=cResource.dspView&ResourceID=653
&ClassID=0
• We will complete the worksheet as we all
complete the simulation together !
• Make sure you are following along!