- #1
damndamnboi
- 5
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According to my physics textbook: Workdone=force x distance moved by object in the direction of the force. This is ridiculous in a scenario with no friction force.
For example, an object of mass 5kg, in space with no friction force or gravitational force is accelerated from rest to a velocity of 10ms-1 by a force of 10N over 5seconds. From Newton first law, the object will continue to move at a velocity of 10ms-1 even after the force applied is removed and will continue forever unless another force is applied to stop it. As such, the distance moved by the object in such a scenario will be infinite. Infinite x 10N = infinity. Does this means a force 10N applied for 5s can transfer infinite amount of energy?
For example, an object of mass 5kg, in space with no friction force or gravitational force is accelerated from rest to a velocity of 10ms-1 by a force of 10N over 5seconds. From Newton first law, the object will continue to move at a velocity of 10ms-1 even after the force applied is removed and will continue forever unless another force is applied to stop it. As such, the distance moved by the object in such a scenario will be infinite. Infinite x 10N = infinity. Does this means a force 10N applied for 5s can transfer infinite amount of energy?
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