Which of the following is an example of kinetic energy transfer?(1 point)
Responses
A large snowball sitting at the top of a hill
Xavier pushing Brad down the snowy hill on a sled
A car driving up a steep hill
Jules sitting in a chair
Xavier pushing Brad down the snowy hill on a sled
Which example demonstrates kinetic energy?(1 point)
Responses
A wave crashing on the shore
A stretched-out rubber band
A car parked in the parking lot
A rock sitting at the top of a hill
A wave crashing on the shore
When Kiara plays the piano, how does kinetic energy transfer from one object to the other?(1 point)
Responses
Energy transfers from Kiara’s fingers to the piano keys
Energy transfers from the piano keys to Kiara’s fingers
Energy transfers from the piano pedals to the piano keys
Energy transfers from the air to Kiara’s fingers
Energy transfers from Kiara’s fingers to the piano keys
The example of kinetic energy transfer among the given options would be:
Xavier pushing Brad down the snowy hill on a sled.
To determine which of the given options is an example of kinetic energy transfer, we need to understand what kinetic energy is. Kinetic energy is the energy possessed by an object due to its motion. When an object is in motion, it can transfer its kinetic energy to another object or transfer the energy within itself.
Let's examine each option:
1. A large snowball sitting at the top of a hill: In this scenario, the snowball is not in motion, so there is no kinetic energy transfer. The snowball may have potential energy due to its position at the top of the hill, but kinetic energy transfer specifically refers to energy being transferred through motion.
2. Xavier pushing Brad down the snowy hill on a sled: This scenario involves the transfer of kinetic energy. Xavier pushes Brad, causing the sled to move, and as the sled moves down the hill, kinetic energy is being transferred from Xavier's push to the sled and then to Brad. This option demonstrates kinetic energy transfer.
3. A car driving up a steep hill: In this scenario, the car is using energy, but it does not involve the transfer of kinetic energy. When a car drives up a hill, it is converting chemical potential energy from fuel into mechanical energy to move the car against gravity.
4. Jules sitting in a chair: This scenario does not involve any motion, so there is no kinetic energy transfer. Jules sitting in a chair does not result in any energy being transferred.
Therefore, the option that demonstrates an example of kinetic energy transfer is option 2: Xavier pushing Brad down the snowy hill on a sled.