GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The rapid transfer of ____ energy is the cause of injuries in a car collision.
A
potential
B
kinetic
C
electrical
D
gravitational
Explanation: 

Detailed explanation-1: -Kinetic energy in a moving object is never lost, but may be transferred to another object. When the energy is transferred to another object, it will be accelerated. If this energy transfer is to a human body and is above the level the body can tolerate, tissue damage will result.

Detailed explanation-2: -3.2Collision energy conversion Most of the kinetic energy in the collision process is converted into the internal energy of the car, because the metal plastic deformation after the collision increases the internal energy a lot. Other kinetic energy is converted into heat energy, sound energy, etc.

Detailed explanation-3: -The total kinetic energy before the collision is not equal to the total kinetic energy after the collision. A large portion of the kinetic energy is converted to other forms of energy such as sound energy and thermal energy.

Detailed explanation-4: -The kinetic energy stored in a moving vehicle is related to the mass and speed of the vehicle by the equation E = ½mv². All else being equal, if your car is twice as heavy it has twice the kinetic energy and if it is moving twice as fast it has four times the kinetic energy.

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