Flashcards in Motion Deck (20):
What is the difference between a vector and scalar?
A scalar quantity is a one dimensional measurement of a quantity
A vector has more that one number associated with it
What is the difference between weight and mass?
Mass is the actual amount of material contained in a body (it’s measured in kg) (ITS A SCALAR)
Weight is the force exerted by the gravity on an object (ITS A VECTOR)
What is the difference between displacement and distance?
Distance refers to how much ground the object has covered during its motion (ITS A SCALAR)
Displacement is the distance between starting and ending point (it’s the object overall change in position)(ITS A VECTOR)
What is acceleration?
The rate of change of velocity per unit of time
What is force?
And influence that changes the motion of a body, or causes motion stress on a stationary object.
What is momentum?
The quantity of motion of a moving body, measured as a product of its mass and velocity.
What is energy?
Energy is something that is needed to make things happen or change (measured in joules) cannot be created or destroyed but it can be transferred and stored.
What is the distance, speed and time equation?
Speed X Time
How do you work out distance?
Speed X time
How do you work out speed?
Distance % time
How do you work out time?
Distance % speed
What is the typical speed for walking?
What is the typical speed for running?
What is the typical speed for cycling?
How do you work out speed from distance time graphs?
Look and the distance and speed axis then do distance % time.
What is the acceleration, velocity and time equation?
Change in speed
Acceleration X Time
What is the acceleration in free fall?
9.8 metres per second per second (9.8 m/s/s)
What does magnitude tell you?
The size of an object’s displacement
e.g. if an object is displaced along the x-axis by -3 (west) then the magnitude of displacement is 3. And the displacement is 3 West.
What does velocity time graphs tell you?
They give information about the journey of an object.
You can also work out the acceleration of the object and the distance travelled during the journey.