因为这条问题中有两个不同的力在不同时间出现 所以虽然最终的s=0 但total workdone 也不是0.No the wer is zero since in the equation W=Fs. s is the displacement. So in your case the displacement is zero so there will no work done. Your wer is the energy used not work done...
Work-Energy TheoremThe theorem states that the work done on an object is the change in kinetic energy of it. The work done is measured in Joules and it is represented in the equation asW=ΔK=12m(v2−u2)=m×a×d=F×dW=ΔK=12m(v2−u2)=m×a×d=F×d...
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Why does the energy change depend on the initial energy/velocity/momentum it had? Mathematically, I understand that : kinetic energy is proportional to v2v2 and hence we cannot calculate change in energy as (1/2)m(Δv)2(1/2)m(Δv)2 Work done is force times displa...
The work done on a system by a constant force is the product of the component of the force in the direction of motion times the distance through which the force acts. For one-way motion in one dimension, this is expressed in equation form as W = Fd cos θ, where W is work, F is...
Work Done by a Variable Force 7:10 Energy | Definition, Types & Uses 9:40 Kinetic vs Potential Energy | Definition, Differences & Examples 5:59 Work-Energy Theorem | Definition, Equation & Examples 4:29 6:39 Next Lesson Conservation of Mechanical Energy | Overview, Formula & Example...
When an object moves under the influence of a force, then work is done according to the equationwhere W is the work done, F is the force (N) and s is the displacement (m) in the direction of the force. The SI unit of work is the joule (J), which is a scalar quantity defined...
Let us start by considering the total, or net, work done on a system. Net work is defined to be the sum of work done by all external forces—that is,net workis the work done by the net external forceFnet. In equation form, this isWnet=Fnetdcosθwhereθis the angle between the ...
atherefore no energy equation was solved. Mass transfer between phases and chemical reactions were neglected. As mentioned earlier, the interphases drag forces would mainly dominate the motion of bubbles and themagnitude of lift force is much smaller than the interphases drag force. Considering this,...
True or False?Work-Energy Principle:When work is done by many forces acting on a body, the kinetic energy of the object changes. The total work done by all the forces appears as change in kinetic energy of the object, which is the statement of ...