Physics Flashcards
What are energy stores?
The capacity for doing work
Name as many energy stores as possible
Gravitational potential, Kinetic energy, Elastic potential, Electrostatic potential, Magnetic potential, Chemical potential, Thermal energy store
What objects have kinetic energy?
Moving ones
Which energy store decreases when a ball is dropped?
Gravitational potential energy store
What unit is work done measured in?
J / Joules
What is the equation for work done?
Work done = force * distance
How much energy is transferred if you push a cart 100m with a force of 50N?
W=fd 100m50N Work done = 5000J
What is work done?
The amount of energy transferred on an object in Joules
What is power?
The rate of work done
What is the equation for power?
Power = Work done
Time (s)
What is power measured in?
W / Watts
On a distance time graph, what does a curve upwards represent?
Acceleration
On a distance time graph, what does a sloped gradient represent?
Constant speed
On a distance time graph, what does a horizontal line represent?
A stop
On a distance time graph, what does a sloped line going down represent?
Constant speed back to the start
On a distance time graph, what does a curve downwards represent?
Deceleration
What is acceleration?
How fast an object speeds up
What is terminal velocity?
The maximum velocity an object can attain when falling
How do you calculate acceleration?
Acceleration = change in velocity
Time
What is Newton’s Third Law?
For every action there is an equal and opposite reaction
Name a force that stops things from falling faster than terminal velocity
Air resistance
What increases as speed does?
Air resistance
How do you calculate acceleration on a distance time graph?
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSG8yY131OK-m0GySLhsN-jLiUlBLksY23HCQ&s
What is the difference between a scalar and vector quantity?
Scalar has QUANTITY and MAGNITUDE only. Vector has QUANTITY, MAGNITUDE and DIRECTION.
