mg is the force, not the work done.imy786 said:Power= mg/ time
Right. [itex]P = mg \sin (a) v_0[/itex].imy786 said:power= vsine mg
Power in physics is the rate at which work is done or energy is transferred. It is measured in watts (W) and is calculated by dividing the amount of work or energy by the time it takes to do it.
Power is directly proportional to both force and velocity. This means that an increase in force or velocity will result in an increase in power. The formula for power is P = F x v, where P is power, F is force, and v is velocity.
Average power is the amount of power used or produced over a period of time, while instantaneous power is the power used or produced at a specific moment in time. Average power is calculated by dividing the total work or energy by the total time, while instantaneous power is calculated by dividing the change in energy by the change in time.
Power and energy are closely related, as power is the rate at which energy is transferred or used. This means that the more power is used or produced, the more energy is transferred or used over a given time period. The unit of energy, joules (J), is also equal to a watt-second (W·s).
Yes, power can be negative. This occurs when work or energy is being transferred in the opposite direction, such as when an object is slowing down or when energy is being absorbed instead of produced. In these cases, the power is considered to be negative because the energy is decreasing instead of increasing.