Question
Which example demonstrates kinetic energy?(1 point)
Responses
A wave crashing on the shore
A wave crashing on the shore
A stretched-out rubber band
A stretched-out rubber band
A car parked in the parking lot
A car parked in the parking lot
A rock sitting at the top of a hill
A rock sitting at the top of a hill does not demonstrate kinetic energy. Kinetic energy refers to the energy of an object in motion.
The example that demonstrates kinetic energy is: A wave crashing on the shore.
The correct example that demonstrates kinetic energy is:
A rock sitting at the top of a hill
To understand why, let's break it down. Kinetic energy is the energy possessed by an object due to its motion. It depends on both the mass and the velocity of the object.
In this example, the rock sitting at the top of the hill has the potential to move or roll down the hill due to the force of gravity acting on it. When it starts rolling, its potential energy is converted into kinetic energy.
To determine which example demonstrates kinetic energy, we need to analyze the options:
1. A wave crashing on the shore: While a wave has energy, it is not an example of kinetic energy because it does not involve the motion of an object.
2. A stretched-out rubber band: A stretched-out rubber band does have potential energy, as it has the capability to snap back and move. However, it is not an example of kinetic energy because it is not actively in motion.
3. A car parked in the parking lot: A parked car does not have any kinetic energy as it is not in motion.
4. A rock sitting at the top of a hill: As explained earlier, this is the correct example of kinetic energy. Once the rock starts rolling down the hill, it gains kinetic energy.
Therefore, the option "A rock sitting at the top of a hill" best demonstrates kinetic energy.