Sport Physics Flashcards
What is a vector
A quantity that has both direction and magnitude
What is a quantity with only a magnitude known as
A scalar
What is the magnitude of a vector
The size/value
What are the two measurements that are required to determine the value of a vector
+ displacement
+ distance
What is the distance
The total measurement of how far an object has travelled in a certain time
What is the displacement
The mesurent of how far from the point of origin an object has travelled in a certain time
What is the equation to calculate velocity when given time and displacement
V= S/T (S= displacement)
Therefore velocity is the change in displacement per unit of time
What is the acceleration of an object
The increase or decrease in velocity of an object per unit of time
What is the equation to find acceleration and what does each symbol represent
a= v-u/t
a: acceleration
v: final velocity
u: initial velocity
t: time
What is the experiment used to determine the acceleration of an object
Place the object at the top of a downward slope and let it run down, through two light gates at separate heights of the slope. The velocity at each height can be recorded and plugged into the equation.
What does the vertical velocity of an object always equate to
The gravitational field strength of the planet it is situated on
E.g. vertical velocity on earth = 9.8
When determining the bearing of a vector, what is the striating point of the angle
The north-pointing line
What must the lines of distance do in a vector diagram, when determining the displacement
They must go TIP-TO-TAIL in the diagram
How do you determine the displacement of a vector from two lines of distance
Use Pythagorus’ theorem
How can the distance travelled by an object be calculated from a velocity/time graph
By calculating the area of the space beneath the line of the graph
What is unbalanced force
The total force acting upon an object, based on the size of the opposite forces acting upon it.
Unbalanced force = (Larger force - smaller force)
What is the other equation for unbalanced force when given mass and acceleration
Fun= ma
What is the opposite, countering force to movement
Friction
What is Newton’s first law
A body will remain at rest or move at a constant speed unless acted upon by an unbalanced force
What is Newton’s second law
When an unbalanced force acts upon an object, the object will accelerate in proportion to the size of the force
What is Newton’s third law
To every action, there is an equal but opposite reaction
What is an example of Newton’s third law
As a kayaker pushes against the water with their paddle, the water pushes against the paddle - propelling him forward.
What is the term used to describe the energy required to move an object
Work done
What is the equation of work done
Ew= Fs
F: force
s: displacement
