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A wright lifter lifts a bar. Which one of these statements is correct?
- A The weight lifter uses energy to exert a force on the bar
- B The force of the bar uses up the weight lifters energy
- C The weight lifter uses force to exert energy on the bar
- D The energy in the bar uses up the weight lifter's force
That's Correct!
It's Wrong!
The correct answer is that the weight lifter uses energy to exert a force on the bar. This is because in order to lift the bar, the weight lifter needs to apply a force against the force of gravity. This force requires energy, which is provided by the weight lifter's muscles.
