HEL PLZZZ An apple is growing in the top branches of an apple tree. The stem breaks and the apple falls, moving faster and faster until it hits the ground.

Where is the energy to increase the speed of the apple coming from?

Energy is being created as the apple falls

Energy is not related to the speed of an object

The potential energy the apple had due to its height is converted to kinetic energy

The force from the wind that broke the stem is also pushing the apple down

The potential energy the apple had due to its height is converted to kinetic energy

Explanation:

When an apple falls from the tree to the ground, its energy of position stored as gravitational potential energy is converted to kinetic energy, the energy of motion, as it falls. When the apple hits the ground, kinetic energy is transformed into heat energy.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.