Interlude C- Energy Conservation I

What is name given to the sum of the kinetic and potential energy?

Total mechanical energy

What is name given to forces that have a defined potential energy?

Conservation

When the gravitational force is the only force acting on an object, how do we express conservation of total mechanical energy, E_total=E_total,0?

E_K + E_g = E_K0 + E_g0

If you throw a ball straight upwards with some speed and from a height defined as zero, the ball initially has kinetic energy and zero gravitational potential energy. What happens to its kinetic energy as the ball rises?

Decrease

If you throw a ball straight upwards with some speed and from a height defined as zero, the ball initially has kinetic energy and zero gravitational potential energy. As it rises, the ball's gravitational potential energy remains constant.

False

In the absence of air resistance, which is equivalent to invoking the free fall model, the sum of the kinetic energy and gravitational potential energy of a ball that is rising remains constant.

True

Consider a ball that is falling in the absence of air resistance, which is equivalent to invoking the free fall model. The gravitational potential energy of the ball decreases. Where does this energy go?

The energy is transformed into kinetic energ