Identify the correct expression for the average power delivered to a body whose…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Identify the correct expression for the average power

P_{\text{avg}}

delivered to a body whose kinetic energy changes from

K_i

K_f

in a time interval

\Delta t

. (a)

\dfrac{K_f+K_i}{2\,\Delta t}

(b)

\dfrac{K_f-K_i}{\Delta t}

(c)

\dfrac{K_f-K_i}{2\,\Delta t}

(d)

\dfrac{K_f}{\Delta t}