A box is accelerated from rest along a frictionless surface by a net force of 100N. It covers 40 metres in 5 seconds. Find the mass of the box.

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k