clio gets into an elevator and travels 73m straight up in time of 7 seconds. she then travles the opposite direction straight down, for 90m in a time of 16 seconds. what her average speed over 23 seconds period

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy