Question

what is most likely true about speed? a. it is only used in sports involving racing, such as running and cycling. b. it is mainly influenced by an athletes balance and agility. c. it is controlled by the part of the brain known as the cerebellum. d. it is most easily increased when resistance is at a minimum.

Explanation:

• Option A: Speed is used in many sports beyond just racing - like soccer (for sprints), basketball (for fast breaks), etc. So A is false.
• Option B: Speed is more related to factors like muscle power, stride length/frequency, and cardiovascular fitness. Balance and agility are more for coordination and quick changes in direction, not primary for speed. So B is false.
• Option C: The cerebellum is mainly for balance, coordination, and motor learning. Speed is more related to motor cortex, muscle strength, and energy systems. So C is false.
• Option D: According to physics (force = mass × acceleration, and resistance opposes motion), when resistance (like air resistance, friction) is minimized, it's easier to accelerate and thus increase speed (since less force is needed to overcome resistance). This makes D the most likely true statement.

Answer:

D. It is most easily increased when resistance is at a minimum.