Which of the following mechanical quantities is evident in explosive track and field events, such as the long jump and the shot put.
A. kinetic energy
B. potential energy
C. mechanical work
D. mechanical power
Answer: D
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Biomechanics Chapter 12
- From a mechanical perspective, it is easier to pull an object than to push it.
- A motionless object sitting on a motionless surface, with no horizontal force application, has no friction.
- Harder running surfaces result in greater ground reaction forces.
- Elite sprinters display greater impulse against the starting blocks than sub-elite sprinters.
- New blade designs have resulted in extremely low values for the kinetic friction coefficients of ice hockey skates on ice.
- An impact resulting in the total loss of velocity would be called a perfectly _______________ impact.
- Two common forces that act to reduce momentum are _______________ and _________________.
- Newton's law of acceleration demonstrates the relationship between acceleration, _______________ and ___________________.
- A number that serves as an index of elasticity for colliding bodies is called coefficient of ___________________.
- Newton's law of _______________ can be restated as the conservation of ________
- Which of the following is a correct unit of mechanical power?
- Which of the following is/are correct formula(s) for mechanical power?
- Negative mechanical work involves which of the following?
- The formula for mechanical work is the product of which of the following?
- Which of the following affects the coefficient of restitution between a tennis racket and tennis ball?
- Which of the following is closest to a perfectly elastic impact?
- What happens to momentum when an impulse acts on a system?
- Which of the following is a correct unit for linear momentum?
- How does wearing gloves increase the friction between the hands and the bat?
- How does adding weight to the back of a pickup increase the friction between the tires and the icy road?
- Which of the following relationships is always true?
- Which of the following is/are true statement(s) regarding the law of gravitation?
- What is/are the direction(s) for vertical ground reaction force?
- Which of the following would be typical for vertical ground reaction force (GRF) during running?
- What type of energy is strain energy?