What happens when an unbalanced force acts in the opposite direction of an object?
It will make it go faster or accelerate.
It will lose mass.
It will slow down or decelerate

Idon't see the pic?

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy