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Samantha wishes to maintain her weight and goes to the gym to work off the calories she consumed at breakfast that morning. She lifts a 30.0-kg barbell from shoulder level to above her head, through a vertical height of 0.550 m. How many times must she lift the barbell to make up for the 3.35 102 Calories of energy she consumed at breakfast? Note that Calories refers to food calories. (Include lowering the barbell as well.)

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The number of times that the weight must be lifted is 9 times.

What are calories?

The term calories refers to the energy value that is derived from food. Following the principle of energy conversion, we know that the energy in the food is converted to the work done as the weight is lifted.

Since work done = mgh = 30.0-kg * 9.8ms^2 * 0.550 m = 161.7 J or 38.6 Cal

Thus, for the number of  times the weight must be lifted;

38.6 n = 3.35 * 10^2

n =  3.35 * 10^2/38.6

n = 9 times

Learn more about food calories:https://brainly.com/question/27327253

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