Select the correct answer. why is the primary mirror in a telescope curved? a. to magnify the image b. to direct light rays to a focal point to intensify them c. to change the direction of the rays d. to bend the rays e. to absorb extra light

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