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Select all that applyIn the motion of a child on a swing, mechanical energy decreases due to a loss of energy to other forms. Select which factors cause this decrease in mechanical energy.Multiple select question.an increase to the chemical potential energy of the systeman increase to the elastic potential energy of the systemfriction on the chain that supports the swingair resistance as the child moves through the air

Question

Select all that applyIn the motion of a child on a swing, mechanical energy decreases due to a loss of energy to other forms. Select which factors cause this decrease in mechanical energy.Multiple select question.an increase to the chemical potential energy of the systeman increase to the elastic potential energy of the systemfriction on the chain that supports the swingair resistance as the child moves through the air

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Solution

The factors that cause a decrease in mechanical energy in the motion of a child on a swing are:

  • Friction on the chain that supports the swing
  • Air resistance as the child moves through the air

These two factors convert some of the mechanical energy into heat, thus reducing the total mechanical energy of the system.

An increase in the chemical potential energy of the system or an increase in the elastic potential energy of the system are not relevant in this context. The swing system does not involve any chemical reactions that would change the chemical potential energy. Similarly, a swing does not deform significantly to store elastic potential energy.

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