At a particular instant

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

At a particular instant, a particle experiences a force

\mathbf F = (4\,\text{N})\,\hat i + (3\,\text{N})\,\hat j

while its velocity is

\mathbf v = (-2\,\text{m/s})\,\hat i + (5\,\text{m/s})\,\hat j

. What is the instantaneous power (in watts) delivered to the particle by the force at that instant? (a)

+26\,\text{W}

(b)

+7\,\text{W}

(c)

-7\,\text{W}

(d)

+14\,\text{W}