The only difference between rotational and translational kinetic energy is that translational is straight line motion while rotational is not. The rotational motion of the tire means it has rotational kinetic energy while the movement of the bike along the path means the tire also has translational kinetic energy.

Translational kinetic energy is directly proportional to mass and the square of the magnitude of velocity. Change in kinetic energy is the difference between the final and initial kinetic energy.

Sometimes people forget that objects can have both rotational kinetic energy and translational (linear) kinetic energy. For example, a ball that is dropped only has translational kinetic energy. However, a ball that rolls down a ramp rotates as it travels downward.

This relationship assures that the momentum of the object remains constant. This is not necessarely zero, and thus it is possible to change the kinetic energy of an object without changing its momentum as long as the object’s mass is not fixed.

The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved. Kinetic energy can be transferred between objects and transformed into other kinds of energy.

(a) Can kinetic energy of a system be changed without changing its momentum ? (a) Yes, For example, when a bomb explodes linear momentum is conserved, but KE changes.

No, kinetic energy is not a force. It’s not possible to change KE of a body without applying an external force. Sometimes even applied force can’t change KE if it is acting perpendicular to the direction of motion e. g. in uniform circular motion.

In the explosion of a bomb or inelastic collision between two bodies as force is internal, momentum is conserved while KE changes. Hence, the KE of a system can be changed without changing its momentum.

The change in kinetic energy of a particle is equal to the work done on it by the net force.

The two main factors that affect kinetic energy are mass and speed.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

One of the most important similarities between potential energy and kinetic energy is that they can both be converted into each other’s form of energy. When a force is applied to potential energy it converts to kinetic energy. This means that when an object such as a ball is still it has the potential to move.