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Comparison of weight and mass mass – measure of the amount of material in an object -measure of an object’s inertia units – g, kg Measured by placing an.

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Presentation on theme: "Comparison of weight and mass mass – measure of the amount of material in an object -measure of an object’s inertia units – g, kg Measured by placing an."— Presentation transcript:

1 Comparison of weight and mass mass – measure of the amount of material in an object -measure of an object’s inertia units – g, kg Measured by placing an object of unknown mass on a balance and comparing to an object of a standard known mass 20 kg

2 Comparison of weight and mass weight – measure of the pull of gravity on an object units – N Measured by placing an object on a spring scale to measure the downward pull of gravity

3 Calculating weight F g = F w = ma = mg Weight is the scalar of Fg and is found by multiplying an object’s mass times the acceleration due to gravity

4 “weightlessness” escape velocity –the minimum speed required to escape the pull of gravity, 11 km/s. microgravity – objects in free fall appear to be “weightless” because there is no normal force to balance gravitational force. http://galileoandeinstein.physics.vir ginia.edu/more_stuff/Applets/newt/ newtmtn.html

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