2. Biomechanics

Kinetics — Quiz

Test your understanding of kinetics with 5 practice questions.

Practice Questions

Question 1

During a maximal vertical jump, an athlete generates a significant ground reaction force. If the athlete has a mass of $75 \text{ kg}$ and achieves an upward acceleration of $15 \text{ m/s}^2$ during the push-off phase, what is the magnitude of the ground reaction force exerted on the athlete? Assume the acceleration due to gravity is $9.8 \text{ m/s}^2$.

Question 2

A long jumper is in the flight phase after takeoff. Ignoring air resistance, which of the following statements accurately describes the forces acting on the jumper during this phase?

Question 3

Consider a scenario where a gymnast is performing a handstand. Which of the following best describes the interaction between the gymnast's hands and the floor in terms of forces?

Question 4

A rugby player is tackled and slides across the grass. If the player has a mass of $90 \text{ kg}$ and the coefficient of kinetic friction between the player and the grass is $0.4$, what is the magnitude of the friction force opposing the player's motion? Assume the acceleration due to gravity is $9.8 \text{ m/s}^2$.

Question 5

During the upward phase of a squat jump, which of the following statements most accurately describes the relationship between the internal muscular forces and the external forces acting on the athlete?