Mass and Weight Presentation PDF

Mass and Weight Mass: Weight: Mass is a measure of the quantity Weight is a gravitational force on an object of matter in an object at rest relative to with mass the observer Weight is...

Mass and Weight Mass: Weight: Mass is a measure of the quantity Weight is a gravitational force on an object of matter in an object at rest relative to with mass the observer Weight is a force, so it is Mass is a scalar quantity a vector quantity The SI unit for mass is The SI units for force are newtons (N) the kilogram (kg) Weight is the effect of a gravitational Consequently, mass is the property of an field on a mass object that resists change in motion The greater the mass of an object, the The weight of a body is equal to the product more difficult it is to speed it up, slow it of its mass (m) and the acceleration of free down, or change its direction fall (g) Gravitational Field Strength Gravitational field strength is defined as: The force per unit mass acting on an object in a gravitational field On Earth, this is equal to 9.81 N/kg Gravitational field strength is also known as acceleration of free fall, or acceleration due to gravity In this context the units are m/s2 The value of g (gravitational field Mass Vs Weight Using a Balance An object’s mass always remains the same, The weight of two objects can be compared however, its weight will differ depending on using a balance. the strength of the gravitational field on different planets Because the gravitational field strength (g) is constant everywhere on Earth, this also For example, the gravitational field allows us to measure the mass of an object. strength on the Moon is 1.63 N/kg, meaning an object’s weight will be about 6 times less than on Earth