KINETIC ENERGY
Work refers to an activity involving a force and movement in the directon of the force.
W= (F)(D)
Work= (Net Force)(Displacement)
Power measures how much work you have done in a given amount of time.
Power= Work/Time
Energy is the ability to do work. This includes changing position or apply force. Kinetic energy, more specifically, is the energy of a moving object. We can find the KE of an object with this formula:
KE= .5 (m)(v^2)
Kinetic energy= .5 (mass)(velocity squared)
W= (F)(D)
Work= (Net Force)(Displacement)
Power measures how much work you have done in a given amount of time.
Power= Work/Time
Energy is the ability to do work. This includes changing position or apply force. Kinetic energy, more specifically, is the energy of a moving object. We can find the KE of an object with this formula:
KE= .5 (m)(v^2)
Kinetic energy= .5 (mass)(velocity squared)
Relating to football
In football, every object that is moving has kinetic energy. The ball being thrown has a certain kinetic energy depending on its mass and velocity once it is in motion. Each player also has a certain kinetic energy when running on the field. kinetic energy is almost always applied to football unless the ball and/or the players are not in motion.
review question
A football has a mass of almost 0.45 kg. When thrown, it has an initial speed of 2 m/s. What is the kinetic energy?
.9 J
True or false: KE and PE are directly proportional
False
.9 J
True or false: KE and PE are directly proportional
False