Energy and Work

Energy and work Exercises

Contest worth points. ​ MUST BE DEVELOPED IN THE NOTEBOOK!!!!

Multiple Select

A bag (13Kg) is carried by a girl over a hill (12m), by accident she let go the bag over the cliff at the top of the hill. Does it have Gravitational potential energy? if so, how much is it?

• 1528,8 J

• 1528,8 N

• It does not have gravitational potential energy

• 1528,8 $$\frac{kg\times m^2}{s^2}$$

Open Ended

Maria is pushing the wall, how much is the work applied to it?

Multiple Choice

Kinetic energy is the energy of motion, its equation is:

• $$KE\ =\ \frac{1}{2}m\times v^{ }$$

• $$KE\ =\frac{1}{2}v\ \times m^2$$

• $$KE\ =\ \frac{1}{2}m\ \times v^2$$

• $$KE\ =\ 2m\ \times v^2$$

Diagram forces

Model a box that has two forces acting on it, 12 N to the right and 4N to the left. Also model the gravity. Remember the knowledge of direction and velocity to do so.