A particle experiences a force (for )

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

Problem

1\,\text{kg}

particle experiences a force

F(x)= -\dfrac{6}{x^{2}}\,\text{N}

(for

x>0

), where

x

is in metres. Taking the potential energy to be zero at

x \rightarrow \infty

, what is the potential energy of the particle at

x=3\,\text{m}

? (a)

-0.67\,\text{J}

(b)

+2\,\text{J}

(c)

-2\,\text{J}

(d)

-6\,\text{J}