Apparatus for generating a dynamic force response that simulates a dynamic force typically generated by an experimental event. A cam having a profile, such as a serrated profile, rotates about an axis according to a rotational speed profile. A braking device operatively connects to the cam, such as a follower biased against the cam, for generating a braking force resisting rotation of the cam. A measurement device measures the braking force on the cam to generate the dynamic force response.