Relationship between force and kinetic energy

How does force relate to kinetic energy? | Socratic

relationship between force and kinetic energy

To find the force of impact, you need to know kinetic energy (mass x 1/2 x velocity squared) and distance over which the impact took place. The following equation is used to represent the kinetic energy (KE) of an object. solving, but also a guide to thinking about the relationship between quantities. Unlike velocity, acceleration, force, and momentum, the kinetic energy of an. The relationship between Kinetic Energy (KE) and force (F) can be seen by looking at the relationship between several basic equations. First, Kinetic Energy is.

Relationship between force and (kinetic) energy

So moving an object a distance x with a force F changes the kinetic energy in a mathematically direct fashion. This description of forces, masses, and energies is a little simplistic.

relationship between force and kinetic energy

Wikipedia's article has some mathematical rigor but both are very informative. I hope this answered your question and piqued your interest, Mark Follow-Up 1: Kinetic Energy is Relative Q: Kinetic energy is entirely relative. For a platform-based observer, the car has 50kJ of kinetic energy 0.

Kinetic Energy

Thus the car has no kinetic energy 0. If the driver were to hit the brakes a very funny thing happens. To the platform-based observer the car decelerates and stops: But for the ground-based observer the exact opposite happens!

The car accelerates in the direction of the moving platform and some of the kinetic energy of the platform is transfered to the car. That transfer of energy creates heat and heats up the brakes. So kinetic energy along with maaany other things is reference-frame dependent.

Only a car moving exactly at c would not be reference-frame dependent, but moving at c is impossible.

relationship between force and kinetic energy

In that sense, kinetic energy is not something that has an exclusive physical existence as if the car kinetic energy is the same regardless of the reference frame. Considering this, we can hardly say that a force is converted to kinetic energy. This reminds me of a funny sentence: Is the motion of westwards moving airplane that moves at the same speed of the Earth's rotation according to the airplane's latitude is due to its motors pushing out compressed air or is due to the fact the Earth is really spinning on itself under the airplane?

relationship between force and kinetic energy

Both answers are correct! This type of energy is known as gravitational potential energy and it is equal to the object's mass multiplied by the height from which it was dropped and the acceleration due to gravity: Impact and Work Work occurs when a force is applied to move an object a certain distance.

How to Calculate Force of Impact | Sciencing

Therefore, work is equal to force multiplied by distance: Because force is a component of work and an impact is the conversion of energy into work, you can use the equations for energy and work to solve for the force of an impact. The distance traveled when the work is accomplished by an impact is called the stop distance.


It is the distance traveled by the moving object after the impact has occurred. Sciencing Video Vault Impact From a Falling Object Suppose you want to know the impact force of a rock with a mass of one kilogram that falls from a height of two meters and embeds itself two centimeters deep inside of a plastic toy. The first step is to set the equations for gravitational potential energy and work equal to each other and solve for force.

The second and final step is to plug the values from the problem into the equation for force. Remember to use meters, not centimeters, for all distances. The stop distance of two centimeters must be expressed as two hundredths of a meter.