Force's relation to energy.?

Question

What is the relation of force to energy? I seem to be having trouble processing this for some reason. The speed of light is a force itself, yes?

Wait a second...let's say that every object has potential energy, as it does, and when this energy is transferred by whatever means that creates a force?

Answer 1

If you apply a force to move an object, you produces work, and this work is equal to the kinecti energy change.

The speed of light is not force!!!!

Answer 2

Carefully... Energy can produce a force. Eg:, Heat energy can expand a gas and the pressure (a force) can move an object. Light energy itself exerts a force called solar wind - but the speed of light is not a force.

Answer 3

The speed of light is not a force.

The easiest way to think of it is that a force is something that causes acceleration (there are only three fundamental forces in nature). An acceleration is a change in the velocity of something.

An objects kinetic energy depends on its velocity (1/2mv^2). A force changes its kinetic energy (it can increase or decrease it). So a force acting changes energy. The amount it changes it of course depends on how long it acts, but you can show that the energy change is equal to the force multiplied by the distance it moves while acting.

Answer 4

Speed of light is NOT a force.It is like velocity.
You are almost there. You need to clear your concepts. Let us do it in a fundamental way, with units and dimensions.
Force=mass*acceleration
= M*LT^-2
Work
=Force*Displacement
=M*LT^-2*L=ML^2T^-2
Energy units are same as work units.
Energy could be potential energy
gained due to height or Kinetic
energy gained due to velocity.
PotentialEnergy
=mass*acceleration*height
=M*LT^-2*L=ML^2T^-2
Kinetic Energy
=1/2*mass*velocity^2
=M*[LT^-1]^2=ML^2T^-2
Please observe that the dimensions
of work,PE,KE are all same.
You will also come across
similar terms in Electricity.
Watts=Volts*amperes=Energy units.
Have I clarified the point or
confused you more?

Answer 5

F=ma and E=mc^2

so, in terms of light

F=(E/c^2)*a

As you can see Mass has a huge amount of energy if converted from mass to energy.

Answer 6

speed of light(velocity) be v

v=dx/dt
velocity is da rate of change of displacement

let p be momentum of da body of mass m n velocity v
p=mv

force is da rate of change of momentum wrt time
F=dp/dt

now work done is forceXdisplacement

dW=Fdx
>dW=dmv/dt*dx

think tis bit clear to u