A particle moves along the x-axis under the force F(x)=3x2N. Which statement is correct regarding this force and its potential energy function V(x)?
a) The force is conservative and V(x)=x3+C
b) The force is non-conservative because its magnitude depends on position
c) The force is conservative and V(x)=−x3+C
d) The force is conservative and V(x)=−3x3+C