How can a stationary metal sphere have kinetic enrgy, the energy of motion
the metal is made of atoms, which store potential energy
the metal sphere can be rolled
the metal is made of atoms,which are vibrating in one place
the metals molecules are moving around
Is it C?
Yes, C is correct. The metal sphere can gain kinetic energy when it is rolled, as the atoms and molecules within the metal are set in motion.
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Yes, you are correct. The answer is option C: "the metal is made of atoms, which are vibrating in one place."
When we talk about a stationary metal sphere having kinetic energy, we are referring to the internal energy of the metal, which is the result of the atoms or molecules that make up the metal vibrating or moving about in their fixed positions. This internal energy is also known as thermal energy or heat energy.
So, even though the sphere as a whole may be stationary, the individual atoms or molecules within the metal are constantly vibrating, and this motion is what gives rise to the kinetic energy of the metal. The faster the atoms vibrate, the greater the kinetic energy of the metal.
It is important to note that this internal kinetic energy of the metal is different from the kinetic energy associated with the overall motion of the sphere as a whole. In the case of a stationary metal sphere, the overall motion or translational kinetic energy would be zero.
To summarize, the kinetic energy of a stationary metal sphere comes from the internal vibrations of the atoms within the metal, known as thermal energy or heat energy.