In sprint acceleration, which statement correctly describes the relationship between force and acceleration?

In sprint acceleration, which statement correctly describes the relationship between force and acceleration?

• A. Greater horizontal force applied over time increases acceleration according to F = ma
• B. Acceleration depends only on mass, not force
• C. Technique has no effect on force vector
• D. The ground reaction force is not involved

Answer: (A)

In sprint acceleration, acceleration is driven by the net horizontal force you can push into the ground relative to your body mass. Newton’s second law says acceleration equals net force divided by mass, so increasing the horizontal force while mass stays the same makes you accelerate more. In practical terms, pushing harder against the ground generates a larger ground reaction force, and the horizontal component of that force propels you forward. If you increase the horizontal push, you get a higher acceleration. Technique matters because it shapes how much of your push goes forward rather than upward or backward. Efficient technique maximizes the horizontal component of the ground reaction force, boosting acceleration. The ground reaction force is central to this process—it’s the actual force that accelerates you. So the statement that ties greater horizontal force to greater acceleration via F = ma is the best description, while the ideas that acceleration depends only on mass, or that force direction and ground reaction force aren’t involved, don’t fit sprinting physics.

In sprint acceleration, acceleration is driven by the net horizontal force you can push into the ground relative to your body mass. Newton’s second law says acceleration equals net force divided by mass, so increasing the horizontal force while mass stays the same makes you accelerate more. In practical terms, pushing harder against the ground generates a larger ground reaction force, and the horizontal component of that force propels you forward. If you increase the horizontal push, you get a higher acceleration.

Technique matters because it shapes how much of your push goes forward rather than upward or backward. Efficient technique maximizes the horizontal component of the ground reaction force, boosting acceleration. The ground reaction force is central to this process—it’s the actual force that accelerates you. So the statement that ties greater horizontal force to greater acceleration via F = ma is the best description, while the ideas that acceleration depends only on mass, or that force direction and ground reaction force aren’t involved, don’t fit sprinting physics.