Kinetic energy is the measurement of the motion of an object. In the above formula, m stands for mass (in kg) and v stands for velocity (in meters per second). Kinetic energy is measured in joules (J).

- What is the kinetic energy of a person who has a mass of 70 kg walking at 1 m/s?
- What is the kinetic energy of a train that has a mass of 100,000 kg traveling at 100 m/s?
- What is the mass of a car that is traveling with 98,000 J of kinetic energy at 7 m/s?
- Calculate the kinetic energy of a pendulum if it moves at an average of 1 m/s and weighs 100 g (there are 1000 g in 1 kg).
- Which has more kinetic energy: A 30 kg pit bull running at 2 m/s or a 5 kg Yorkie running at 5 m/s? Show your calculation.
- Which of the two dogs from #5 has more momentum (momentum = mass x velocity)? Show your calculation.
- Considering your answers to #5 and #6:
- Which dog will have more trouble stopping completely?
- Which dog will consume more calories if they both run for 5 minutes?
- Is it better for football players who need to break tackles to weigh more or to run faster? Why?
- Is it better for marathon runners to weigh less or run faster in order to conserve energy? Why?