Topic 2 Flashcards
What is a scalar quantity?
A quantity that only has a magnitude (size)
What is a vector quantity?
A quantity that has a magnitude (size) and direction
Examples of scalar quantities:
- speed
- distance
- mass
- energy
Examples of vector quantities:
- displacement
- velocity
- acceleration
- force
- weight
- momentum
Equation for average speed:
Average Speed (m/s) = Distance (m) / Time (s)
Equation for momentum:
Momentum (kg m/s) = Mass (kg) x Velocity (m/s)
Why do objects stay in circular motion
Due to centripetal force
What is Newtons First Law?
An object at rest stays at rest and an object in motion stays in motion unless a force is acted upon it.
What is Newtons Second Law?
F (N) = m (kg) x a (m/s 2)
What is Newtons Third Law?
When 2 objects interact, they apply forces of equal magnitude but opposite direction
What is the equation for weight?
Weight (N) = Mass (kg) x Gravitational Field Strength (N/kg)
What does the gradient represent in a Distance Time Graph
The Speed
What does a flat line mean in a Distance Time Graph?
Stationary
What is the equation for acceleration?
Acceleration (m/s 2) = Change in Velocity (m/s) / Time (s)
How do you determine the distance in a Velocity Time Graph?
The area under the line
