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 24.0-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 3.50 102 Calories of energy she consumed at breakfast?
here,
for the energy needed to lift the barbell
u1 = mgh
u1 = 24 * 9.8 * 0.550
u1 = 129.4 J
Now, for the total number of times
number of times taken = total energy/u1
number of times taken = 3.5 *10^2 * 4186/(129.4)
number of times taken = 11325
the number of times taken is 11325
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