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How much hip flexion is necessary for ascending the stairs?

a. 111-120 degrees
b. 102-112 degrees
c. 47-66 degrees
d. 32-45 degrees

Answer :

Final answer:

The optimum angle for launching a projectile to cover the maximum distance is 45°. So the correct answer is b.

Explanation:

When launching a projectile, the optimum angle to cover the maximum distance is 45°. This angle allows the projectile to achieve the highest range. At other angles, the range is reduced due to the decrease in both the vertical and horizontal components of the projectile's velocity.

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