40-250 Inclined Plane
... Raising a mass against gravity requires work. W = (force) x (distance) Since work is dependent on both these factors, the same amount of work can be accomplished with a great force as will a quite small force provided distance is altered accordingly. To demonstrate this concept, we include two examp ...
... Raising a mass against gravity requires work. W = (force) x (distance) Since work is dependent on both these factors, the same amount of work can be accomplished with a great force as will a quite small force provided distance is altered accordingly. To demonstrate this concept, we include two examp ...
to apply the equation to the specific forces present on
... Fnet = ma or ΣF = ma In the second expression the Greek symbol “Σ”, sigma, acts as an instruction to “add up all” the forces acting on the object. That’s the same process as is used to find the net force, so Fnet is the same thing as ΣF. There are two reasons that we will often use ΣF instead of Fne ...
... Fnet = ma or ΣF = ma In the second expression the Greek symbol “Σ”, sigma, acts as an instruction to “add up all” the forces acting on the object. That’s the same process as is used to find the net force, so Fnet is the same thing as ΣF. There are two reasons that we will often use ΣF instead of Fne ...
Target Ideas for Cycle I
... 3. Acceleration Due To Gravity Idea: If the gravitational force between the Earth and an object is the only (significant) force acting on an object, then all objects, regardless of mass, will fall with the same acceleration of 9.80 meters per sec per sec. This means that each second its velocity inc ...
... 3. Acceleration Due To Gravity Idea: If the gravitational force between the Earth and an object is the only (significant) force acting on an object, then all objects, regardless of mass, will fall with the same acceleration of 9.80 meters per sec per sec. This means that each second its velocity inc ...
F - Cloudfront.net
... amount of work done on the object. Note: the net work can be found by either finding the sum of the work done by each individual force or by finding the work done by the net force. ...
... amount of work done on the object. Note: the net work can be found by either finding the sum of the work done by each individual force or by finding the work done by the net force. ...
Notes for Mid
... NOTE: the values we use for g are only valid on the surface of the earth. At other locations – on the moon, another planet, the Sun the value for g changes. It can be higher or lower. (See the section on Gravitation.) 3) An object has a weight 200N What is the mass of the object? m = W/g = 200N/10m/ ...
... NOTE: the values we use for g are only valid on the surface of the earth. At other locations – on the moon, another planet, the Sun the value for g changes. It can be higher or lower. (See the section on Gravitation.) 3) An object has a weight 200N What is the mass of the object? m = W/g = 200N/10m/ ...
Vectors: Motion and Forces in Two Dimensions
... relative magnitude and direction of all forces acting upon an object in a given situation. • The size of the arrow in a free-body diagram reflects the magnitude of the force. The arrow shows the direction that the force is acting. • Each force arrow in the diagram is labeled to indicate the exact ty ...
... relative magnitude and direction of all forces acting upon an object in a given situation. • The size of the arrow in a free-body diagram reflects the magnitude of the force. The arrow shows the direction that the force is acting. • Each force arrow in the diagram is labeled to indicate the exact ty ...
Weight
In science and engineering, the weight of an object is usually taken to be the force on the object due to gravity. Weight is a vector whose magnitude (a scalar quantity), often denoted by an italic letter W, is the product of the mass m of the object and the magnitude of the local gravitational acceleration g; thus: W = mg. The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon. In this sense of weight, a body can be weightless only if it is far away (in principle infinitely far away) from any other mass. Although weight and mass are scientifically distinct quantities, the terms are often confused with each other in everyday use.There is also a rival tradition within Newtonian physics and engineering which sees weight as that which is measured when one uses scales. There the weight is a measure of the magnitude of the reaction force exerted on a body. Typically, in measuring an object's weight, the object is placed on scales at rest with respect to the earth, but the definition can be extended to other states of motion. Thus, in a state of free fall, the weight would be zero. In this second sense of weight, terrestrial objects can be weightless. Ignoring air resistance, the famous apple falling from the tree, on its way to meet the ground near Isaac Newton, is weightless.Further complications in elucidating the various concepts of weight have to do with the theory of relativity according to which gravity is modelled as a consequence of the curvature of spacetime. In the teaching community, a considerable debate has existed for over half a century on how to define weight for their students. The current situation is that a multiple set of concepts co-exist and find use in their various contexts.