The kinetic energy of a particle is a single quantity, but the kinetic energy of a system of particles can sometimes be divided into various types, depending on the system and its motion. For example, if all the particles in a system have the same velocity, the system is undergoing translational motion and has translation al kinetic energy. If an object is rotating, it could have rotational kinetic energy, or if it's vibrating, it could have vibrational kinetic energy. The kinetic energy of a system, relative to an internal frame of reference, may be called internal kinetic energy. The kinetic energy associated with random molecular motion may be called thermal energy. This various types of energy is associated that for every kind of kinetic energy, it is the same physical quantity.Although mass and velocity both have great effects on kinetic energy, it is velocity, more significantly, that determines kinetic energy. Study at the sam ple problem below.

What is the kinetic energy of a 45 kg object moving at 13 m/sec?

1. First we identify the information we are given in the problem:

mass 45 kg

velocity = 13 m/sec

2. Next, we place this information into the kinetic energy formula:

KE = 1/2 mv2

KE = 1/2 (45 kg) (13 m/ sec)2

The kinetic energy value computed is 3802.5 J.

Note: The unit for energy is the same as for work: the Joule (J).

1. What is the Kinetic Energy of a 200 kg object that is moving with a speed of 10 m/s?

2.An object moving with a speed of 40 m/s and has a mass of 250 what is its kinetic energy?

3. A 1500 kq car is moving at a 12 m/s. What is the kinetic energy of

the car?​