How do our muscles obtain energy to exert a force?
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Food is our fuel. Muscles use that fuel with oxygen to release energy and create force.
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Does a push or pull always result in change of state of motion of an object? If no, why?
How is force different from energy?
Why do you think we are unable to push a wall or a tree?
Name two sports that are played by changing the speed and direction of motion of objects.