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Force Summation in Volleyball

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Force Summation in Volleyball

Read each question carefully. Choose one answer for each multiple-choice question. Show your working for calculations and use scientific ideas in your written explanations.

Multiple Choice

Select the best answer.

1.In a powerful volleyball action, what does force summation describe?

One body part producing all the force by itself
Body segments contributing force in sequence so their effects combine
Every body segment moving with equal force at exactly the same time
A player reducing force to keep the ball close

2.Which sequence best shows force summation during a volleyball spike?

Wrist, elbow, shoulder, trunk, legs
Legs, trunk, shoulder, elbow, wrist
Shoulder, wrist, legs, elbow, trunk
All body segments activated together

3.During a serve, a player contributes 260 N from the legs, 140 N from the trunk, 100 N from the shoulder, 55 N from the elbow and 25 N from the wrist. If these contributions combine effectively, what is the total force?

480 N
560 N
580 N
600 N

4.Which is a likely benefit of using a coordinated whole-body sequence in a volleyball serve?

It can transfer more speed and force to the ball
It stops the ball from changing direction
It means the player does not need to use their muscles
It makes the serve easier for the opposing team to predict

Explain the Movement

Use complete sentences and refer to body segments and force transfer.

5.Explain what force summation means and why it can help a volleyball player send the ball with greater force. Include an example from a serve or spike.

6.Describe a sensible sequence of at least four body segments in an overhand volleyball serve. Explain how the sequence helps move force towards the ball.

7.A player swings their legs, trunk, shoulder, elbow and wrist all at once during a spike. Explain why this may transfer less force to the ball than a well-timed sequence.

Calculate and Compare

Add the listed force contributions. Show the addition used for each total.

8.For a spike, Player A contributes 295 N from the legs, 165 N from the trunk, 105 N from the shoulder, 65 N from the elbow and 40 N from the wrist. Calculate the total force contribution.

9.For a spike, Player B contributes 105 N from the shoulder, 65 N from the elbow and 40 N from the wrist, with no listed contribution from the legs or trunk. Calculate the total of the listed force contributions.

10.Using the spike totals of 670 N for Player A and 210 N for Player B, calculate how many more newtons Player A contributes. State what the comparison suggests about including the whole body in force summation.