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boggleface
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Why is work defined as Fd? If you apply the same force to 2 different masses over the same distance surely the larger mass has more energy. Why isn't work defined as Ft??
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Originally posted by boggleface
Why is work defined as Fd?
If you apply the same force to 2 different masses over the same distance surely the larger mass has more energy.
Originally posted by Adrian Baker
It takes more energy to move a truck 100m than it does a bicycle, so more work is done pushing it the same distance.
You also say "surely the larger mass has more energy" What do you mean by this? If I push a truck along a flat road, I do work moving the truck, but don't increase it's energy state.
Originally posted by boggleface
Why is work defined as Fd? If you apply the same force to 2 different masses over the same distance surely the larger mass has more energy. Why isn't work defined as Ft??
Originally posted by boggleface
No. What i mean is that Fd does not sit with my intuition about energy. I imagine 2 different masses bieng accelerated over the same distance with the same constant force. My intuition tells me that surley the larger mass will have more energy. NOTHING TO DO WITH FRICTION! why isn't mv named energy?Is it just me, am i strange?
Originally posted by boggleface If I'm pushing two different masses over the same distance with the same constant force, imagining that no friction is present on the masses, i am pushing the larger mass for a greater amount of time. Surely i have used more calories pushing the greater mass.
Originally posted by boggleface well if I am in space, pushing 2 different masses with the same canstant force over the same distance, surley i feel that i have exerted myself more pushing the larger mass as i have applied the same force over a longer period of time to bring it to the same distance
Originally posted by boggleface
well if I am in space, pushing 2 different masses with the same canstant force over the same distance, surley i feel that i have exerted myself more pushing the larger mass as i have applied the same force over a longer period of time to bring it to the same distance
The definition of work as Fd, where F is the force applied and d is the displacement, is based on the concept of work as a measure of the energy transferred to an object. This definition is more fundamental and universally applicable compared to defining work as Ft, where t is the time taken to complete the work, which is only applicable for certain types of work (e.g. lifting an object at a constant speed).
The definition of work as Fd is directly related to Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. This relationship can be seen in the equation for work: W = Fd = mad, where m is the mass of the object and a is its acceleration.
Yes, work can be negative according to the definition of Fd. This occurs when the force and displacement are in opposite directions. In this case, the work done is considered to be negative because the energy is being transferred away from the object rather than being added to it.
The definition of work as Fd is a measure of the amount of energy transferred to an object, while power as Fv is a measure of how quickly this energy is transferred. Power takes into account the velocity of the object, while work does not. Additionally, power is a rate, measured in watts, while work is a scalar quantity, measured in joules.
The definition of work as Fd is important in mechanical systems because it allows us to quantify the amount of energy being transferred to or from an object. This is crucial in understanding how forces and motion affect mechanical systems, such as machines, and can help in designing and optimizing these systems for maximum efficiency.