What is the curved shape of the flight path of a projectile called?
100
the centre of balance of an object
What is the definition of centre of gravity?
100
A body will remain in its stae of rest or uniform motion until an outside force changes its state
What is Newtons First Law?
100
the amount of substance of a object
What is mass?
100
push or a pull
What is a force?
200
45 degrees
What is the optimum angles of relaese for distance?
200
because some of the persons mass rises
Why does the COG rise above the belly button when a person raises their arms?
200
The greater the force, the greater the acceleration.
The smaller the mass, the greater the acceleration.
The change in motion takes place in the direction the force was applied.
What is Newtons 2nd Law
200
speeding up
What is acceleration?
200
mass x velocity?
What is momentum?
300
projectile
What is an object that is subject only to the force of gravity?
300
Becuase the COG has a greater distance to travel before it can lie outside of the base of support
Why are you more stable if you widen your base of support?
300
Fro every action there is an equal and opposite reaction.
What is Newtons 3rd Law?
300
The speed of an object and its direction
What is velocity?
300
adding the force of one body to the next so that momentum builds
What is Force Summation
400
trajectory
What is the path of a projectile through the air called?
400
lower base of support
What is another way of becoming more stable
400
The difficulty to get a stationary object moving
What is inertia?
400
movement, a change in position of an object
What is motion?
400
friction
What is a force that opposes movement?
500
height of release, speed of release, angle of release
What 3 things affect the trajectory of a projectile?
500
b) A midget on stilts
Who has a higher centre of gravity a)a midget on a skateboard or b) a midget on stilts
500
because more matter has to be moved
Why do objects with greater mass have greater inertia?
500
a force that prevents movement away from the earth
What is gravity?
500
basketball shoes, basketball grip.
name 2 examples from basketball of 'good' friction