We present the results of a test of Newton’s second law for small accelerations. It is found that within experimental errors F=ma holds down to the lowest accelerations measurable with our apparatus, ∼3×${10}^{\mathrm{-}9}$ cm/${\mathrm{s}}^2$.

• Received 17 April 1986

DOI:https://doi.org/10.1103/PhysRevD.34.3240