How much work does it take for the average person (Weight = 700 N) to climb a 10-story tall building (consider each story to be about 3 m)? What fraction is this of the energy in a typical candy bar? (Ecandy bar = 250 Calories and 1 Calorie = 4186 Joules)
work=force*distance=700*30=21000joules=21Kj*1cal/4.18KJ=5.02cal
candy bar=250cal
so 2percent of that energy can be a candy bar.
To find out how much work it takes for the average person to climb a 10-story building, we can use the formula:
Work = force x distance
First, let's calculate the distance. Since each story is about 3 meters, the total distance to climb a 10-story building would be:
Distance = 10 stories x 3 meters/story = 30 meters
Now we know the distance, let's calculate the work using the weight of the person. Weight is a force, and in this case, the weight is given as 700 N (Newtons). So the work can be calculated as:
Work = 700 N x 30 meters = 21,000 Joules
Therefore, it takes 21,000 Joules of work for the average person to climb a 10-story building.
Next, let's find out the energy in a typical candy bar. It is given that the energy in a candy bar is 250 Calories. Since 1 Calorie is equal to 4186 Joules, we can convert the energy in the candy bar to Joules:
Energy in candy bar = 250 Calories x 4186 Joules/Calorie = 1,046,500 Joules
So, the energy in a typical candy bar is 1,046,500 Joules.
Now, to find the fraction of the energy in a candy bar that climbing the building represents, we can divide the work by the energy in the candy bar:
Fraction = Work / Energy in candy bar = 21,000 Joules / 1,046,500 Joules = 0.02
Therefore, climbing a 10-story building represents 0.02, or 2%, of the energy in a typical candy bar.