Impulse equals force times time interval

Steps:

• Recall the definition: Impulse is the change in momentum of an object, given by J = Δp.
• From Newton's second law, F = Δp / Δt, so rearranging gives J = F × Δt.
• Identify the expression matching F × Δt among the choices.
• Eliminate options that represent other quantities like power or work.

Why C is correct:

• Impulse is defined as force multiplied by the time over which the force acts (J = F Δt), and choice C matches this formula directly.

Why the others are wrong:

• A represents average force (F_avg = Δp / Δt), not impulse.
• B is the definition of work (W = F d), not impulse.
• D is force times area, which relates to pressure or thrust, not impulse.

Not enough information in choice C to confirm, but based on standard physics, it aligns with impulse if completing to "time."

Final answer: C