1. The problem statement, all variables and given/known data An object is moving along some path. the total work done on the object during this process is zero. 2. Relevant equations no equation 3. The attempt at a solution A the speed of an object has decreased. B the speed of the object may have changed. C the object must be moving in a circle D the velocity of the object must not have changed E the speed of the object has not changed F the velocity of the object may have changed I chose answer D and E. From what I understand so far work is zero when the Force is perpendicular to the displacement. would speed and velocity changed, when the work of an object is zero?