SUMMARY
Sally needs to offset the energy intake from a 375 ml can of low joule cola, which contains 1.7 kJ per 100 ml. This results in a total energy intake of 6.375 kJ (or 6375 J). To calculate the height she must climb to offset this energy, we apply the potential energy formula PE = mgh, where m is her mass (65 kg), g is the acceleration due to gravity (9.81 m/s²), and h is the height in meters. By rearranging the formula, Sally must climb approximately 9.9 meters to offset the energy consumed.
PREREQUISITES
- Understanding of basic physics concepts, specifically potential energy.
- Familiarity with the formula PE = mgh.
- Knowledge of unit conversions, particularly between kilojoules and joules.
- Basic arithmetic skills for calculations involving mass, gravity, and height.
NEXT STEPS
- Review the potential energy formula and its applications in real-world scenarios.
- Learn about energy conversion between kilojoules and joules.
- Explore the concept of work done against gravity in physics.
- Investigate the nutritional information and energy content of various beverages.
USEFUL FOR
This discussion is beneficial for students studying physics, particularly those interested in energy concepts, as well as anyone looking to understand the relationship between energy intake and physical activity.