A certain amount of energy is transferred by heat into a system. The net work done by the system is (80 J), while the increase in its internal energy is (30 J). What is the amount of net heat? -50

50

110

-110​

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