P1- Energy 🚃🎾🧲 Flashcards
1
Q
What’s kinetic energy?
Hint: stored
A
- kinetic energy is the energy stored in moving objects
2
Q
What are the 8 stores of energy? [8]
Hint: 🧪
A
- thermal energy
- kinetic energy
- gravitational energy
- elastic potential energy
- chemical energy
- magnetic energy
- electrostatic energy
- [nuclear energy stores]
3
Q
What’s gravitational potential energy?
Hint: above the Earth’s…
A
- Gravitational potential energy, is the energy stored in an object, due to the position above the Earth’s surface.
4
Q
What are the four ways that energy can be transferred? [4]
Hint: radiation
A
- mechanically
- electricity
- transferred by radiation
- transferred by heating
- [Think HERM: heating, electrical, radiation and mechanical]
5
Q
What’s a closed system?
Hint: matter
A
- A closed system is a system where neither matter, nor energy can enter or leave.
6
Q
What does work done mean?
Hint: transferred
A
- Work is done, when energy is transferred from one store to another.
7
Q
What is mechanical work?
Hint: force
A
- mechanical work, involves using a force to move an object.
7
Q
What is power?
Hint: two- rate
A
- Power is the rate at which energy is transferred, or the rate at which work is done.
8
Q
- Fill in the gaps: The initial force exerted by a person to throw a ball upwards does work. It causes an energy transfer from the ________ energy store to the _______ of….
A
- The initial force exerted by a person to throw a ball upwards does work. It causes an energy transfer from the chemical energy store [of the person’s arm] to the kinetic energy store of the ball and the arm.
9
Q
- Fill in the gaps: In boiling water in a kettle, energy is transferred to ____ ______, from the _____ kettle’s heating element, by heating and them into the ______ thermal energy store causing the ___________ of the water to rise.
A
- Fill in the gaps: In boiling water in a kettle, energy is transferred to the water from the kettle’s [heating element] by heating and them into the water’s thermal energy store causing the temperature of the water to rise
10
Q
- Fill in the gaps: A ball dropped from a height is accelerated by _______. The ______________force does work. It then causes energy to be transferred from the _______ energy store to its _______ energy store.
A
- Fill in the gaps: A ball dropped from a height is accelerated by gravity.
- The gravitational force does work. It then causes energy to be transferred from the GPE/gravitational potential energy store to its kinetic energy store.
10
Q
Fill in the gaps: A ball dropped from a height is accelerated by _______. The ______________force does work. It then causes energy to be transferred from the _______ energy store to its _______ energy store.
A
Fill in the gaps: A ball dropped from a height is accelerated by gravity. The ______________force does work. It then causes energy to be transferred from the _______ energy store to its _______ energy store.
11
Q
- Fill in the gaps: The _______ between a car’s brakes and it’s wheels does ____, as it slows down. It then causes an energy transfer from the wheel’s _______ energy store, to the _______ energy store of the surroundings.
A
- The friction between a car’s brakes and it’s wheels work, as it slows down. It then causes an energy transfer from the wheel’s kinetic energy store, to the thermal energy store of the surroundings.
12
Q
- Fill in the gaps: In a collision, between a car and a stationary object, the normal contact force between the car and the ______ does work.
- It then causes energy to be transferred from the car’s _______ energy store to other energy stores such as: ….
- ; some energy might be…
A
- Fill in the gaps: In a collision, between a car and a stationary object, the normal contact force between the car and the object does work.
- It then causes energy to be transferred from the car’s kinetic energy store to other energy stores such as: thermal energy or elastic potential energy
- ; some energy might be transferred away, by sound waves.
