A cart is moving leftward at while a horizontal force of pushes it to the right

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

2.0\,\text{kg}

cart is moving leftward at

2.0\,\text{m/s}

while a horizontal force of

15\,\text{N}

pushes it to the right. What is the instantaneous power delivered to the cart by the force at that moment? (a)

-30\,\text{W}

(b)

+30\,\text{W}

(c)

-7.5\,\text{W}

(d)

-15\,\text{W}