Lesson 1: Stores and tranfers

Question 1

What are the energy stores and transfers for a moving object being projected upwards?

Answer 1

-> Kinetic energy (moving)
-> mechanical pathway (force moved object through distance)
-> gravitational potential energy (When it is high in air)

Question 2

What are the energy stores and transfers for a moving object hitting an obstacle?

Answer 2

—> Kinetic (moving)
—> Heating (Friction between car and wall)
—-> Thermal (wall heats up)

Question 3

What are the energy stores and tranfers for a stationary vehicle speeding up (constant force?)

Answer 3

—> Chemical (from petrol)
—> Mechanical (it moves with force of thrust)
—> Kinetic (moving)

Question 4

What are the energy stores and tranfers for a vehicle slowing down?

Answer 4

—-> kinetic (moving)
—> Heating (friction in tires)
—> Thermal (hot tires + road)

Question 5

What are the energy stores and tranfers for water boiling in a kettle?

Answer 5

—> electric in heating element
–> Electric work done to thermal store of element.
—> Heating pathway transfers hot element to water.

Question 6

What is a closed system ?

Answer 6

• A closed system is one where energy cannot enter or exit.

Question 7

What is an open system?

Answer 7

• An open system is one where energy can enter or exit.

Question 8

What is a system?

Answer 8

• A system is an object/ group of objects.

Question 9

3 different energy pathways….

Answer 9

• Heating
• Mechanical
• Electrical