WebW= F•d. W= F * d cosθ. What are the three situations in which the direction of force affects work? 1) Force has a component in SAME direction of displacement= Positive Work. 2) Force has component that is in the opposite direction of displacement= Negative work. 3) Force is perpendicular to displacement= NO work is being done. WebBecause mass can’t be negative and the square of speed gives a non-negative number, kinetic energy can’t be negative. Either something is moving and has positive kinetic energy, or it is not moving and has zero kinetic energy.

CIE AS & A Level Physics 9702: Topic 22: Quantum physics- Unit : …

WebMay 23, 2012 · Potential energy can be negative, and often is. Any attractive force has a negative potential energy. If you take an electron and positron together, the total … WebWork is a measurement of energy, so it may seem odd to think that a work can be negative — but it can! Work is how much energy is done by a force over a distance. Suppose we needed to set up ice hockey goal nets. Initially the nets are standing still with zero … skechers store centralia

The Concept of Negative Energy in Physics Simplified for …

Web– The maximum kinetic energy of the photoelectrons is independent of the intensity of the incident radiation – This is because each electron can only absorb one photon – Kinetic energy is only dependent on the frequency of the incident radiation – Intensity is a measure of the number of photons incident on the surface of the metal WebThe concept of negative energy comes as a solution to this problem. Negative energy is gravitationally repulsive, and hence using it, a wormhole can be kept open, making room for the possibility of interstellar space … WebSince the lowest energy an object can have is when it has no speed, there cannot be any lower value for kinetic energy than zero. For a moving object, kinetic energy is: Here m is the object’s mass in kg, and v is the object’s velocity in m/s. Notice that so far in physics we have not found any particle with negative mass. skechers store casper wy