physics written assignment 2.docx

# physics written assignment 2.docx - PHY-115-OL009 Written...

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PHY-115-OL009 Written Assignment #2 1. Answer the following: 1. What are the units of mass and the units of weight for the metric system? Mass is defined as the physical quantity of matter than an object takes up in space. Mass is what works with and against the forces that are working upon an object, such as gravity, inertia, and friction. The most commonly used unit of mass and the primary unit in the metric system, is the kilogram. A kilogram is 1,000 grams and can be used to find the weight of an object. Weight is described as the force that acts on an object because of gravity. Weight can be calculated by multiplying the mass of an object by the force of gravity that is acting upon it, which would be 9.8N/kg. N/kg is equivalent to m/s 2 in that it is accounting for the acceleration of gravity towards the earth. (61) 2. What are the units of mass and the units of weight for the English system? The unit of mass and weight for the system used in the United States is the pound. It is commonly used to express the weight of an object, and in the U.S. this also accounts for mass. The more accurate measure of weight and mass is by using the metric system that differentiates between the two. (61) b. Explain the relationship between the mass and the weight of an object. Is the mass of an object the same on earth and the moon? Are the weights the same on earth and the moon? The mass of an object is the amount of space that an object takes up in space. It is somewhat like the volume of an object that is solid, as it accounts for whatever space that that object is taking up. The weight of an object is the effect that the force of gravity has on the mass of that object. The force of gravity will work more on an object that has more mass and is denser, meaning that the object will have more weight. The mass of an object

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