The kinetic energy of a 750 kg car moving at 50.0 km h is 72300 joules.
Given,
mass of car (m)= 750 kg
speed of car (v)= 50 km/h
= 50 x 5/18
= 13.9 m/s
we know that kinetic energy= 1/2 x m x v*v
= 1/2 x 750 x 13.9 *13.9
= 72300 joules
so the kinetic energy is 72300 joules.
Energy is the capacity of an object to do work, and like work, energy's unit is the joule (J). Energy exists in many different forms, but the one we think of most often when we think of energy is kinetic energy. Kinetic energy is often thought of as the energy of motion because it is used to describe objects that are moving.
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Answer:
It is always the same as it was before the collision.
Explanation :
In Interspecific competition, different individuals of different species fight for the same resource in an ecosystem. The resources can be food or living space.
Birds belong to the group of<em> aves</em>, squirrels and chipmunks are from the family of <em>Sciuridae</em>.
All three are from different species. They are on the same ecosystem i.e. tree. They form the interspecific competitions.
Kinetic energy = 1/2 * mass* speed^2
= 1/2 * 2* 10*10
= 100 J
