Physics - Paper 1 Flashcards
What is velocity?
Velocity is speed in a given direction. An example of this could be a car travelling at 30 m/s north and a different car travelling south at 30 m/s. Their travelling at the same speed but in opposite directions.
What is acceleration?
The acceleration of an object is its change of velocity per second. The units for acceleration is metres per second squared.
What is stopping distance?
Braking distance + thinking distance = stopping distance.
What is breaking distance?
Breaking distance is the distance taken to stop once the brakes are applied. Things that could affect your breaking distance are the quality of your breaks, mass of the car or weather.
What is thinking distance?
The thinking distance is the distance travelled in the reaction time. The thinking distance could be affected due to tiredness, distractions or even alcohol etc.
What is one individual fact about energy?
One key thing about energy is that it cannot be made or destroyed. Energy is created from a different energy resource.
What is energy efficiency and what are the benefits from it?
Energy efficiency simply means using less energy to perform the same task – that is, eliminating energy waste. It also reduces greenhouse gas emissions.
What is transferring energy?
Transferring energy is very simple. Once you use it all up your not going to be it back, the only way your going to gain it back is by from exerting force from a different energy efficiency.
What are the three radioactive resources?
- alpha (max distance is 5cm)
- beta (max distance is 1m)
- gamma (no max distance, can travel anywhere)
