105k views
5 votes
In a procedure to evaluate the strength of the triceps muscle, what is the recommended method?

1) Measuring the circumference of the upper arm
2) Performing a push-up test
3) Using a dynamometer to measure the force exerted by the triceps
4) Assessing the range of motion of the elbow joint

User Prajoth
by
7.8k points

1 Answer

3 votes

Final answer:

The recommended method to evaluate the strength of the triceps muscle is by using a dynamometer. For a professional boxer whose triceps exert a force resulting in an angular acceleration, the moment of inertia of the forearm can be calculated, providing a measure of the muscle's strength and effectiveness.

Step-by-step explanation:

Evaluating Triceps Strength: Recommended Method



The triceps muscle is a key muscle in the back of the upper arm responsible for extending the forearm. To evaluate the strength of the triceps muscle, the recommended method is using a dynamometer to measure the force exerted by the triceps (option 3). The other options such as measuring arm circumference, performing push-ups, or assessing range of motion might provide some insight but are not direct measures of muscular strength. Specifically, in the context of a professional boxer with a triceps muscle that exerts a force of 2.00 × 103 N and an effective lever arm length of 3.00 cm, generating an angular acceleration of the arm of 120 rad/s2, we can calculate the moment of inertia of the forearm. Using the formula τ = Iα, where τ is the torque, α is the angular acceleration, and I is the moment of inertia, we can solve for I as follows:



  1. First, calculate the torque τ by multiplying the force exerted by the triceps (2.00 × 103 N) with the lever arm (0.03 m).
  2. Apply τ = Iα to find I, where α is given as 120 rad/s2.



τ = (2.00 × 103 N) × (0.03 m)

τ = 60 N⋅m

Now, with the formula τ = Iα, we can substitute α and τ to find I:

60 N⋅m = I × 120 rad/s2

I = 60 N⋅m / 120 rad/s2

I = 0.5 kg⋅m2



The moment of inertia of the boxer's forearm is 0.5 kg⋅m2, revealing an aspect of the triceps muscle's strength and effectiveness in forearm movement.

User SiHa
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories