Newton's
How many Newton's laws are there?
3
What sport uses projectile motion?
Football, rugby, netball, shotput, etc
True or false? Body segments need to be used at the correct time to give maximum momentum
True
What is a force?
Push or a pull
What is Force = mass x acceleration?
Newton's 2nd law
Who has a higher centre of gravity a)a midget on a skateboard or b) a midget on stilts
b)
What is the optimal angle of release for distance?
45 degrees
What happens when the timing and sequence of a movement is wrong?
Looks uncoordinated and not produce maximum force
What is acceleration?
Speeding up
What is Newton's first law?
Law of inertia
What is another way of becoming more stable
Lower your centre of gravity
What is an object that is subject only to the force of gravity
Projectile
What is Force Summation?
adding the force of one body to the next so that momentum builds
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. What principle is that referring to?
Newton's 1st law
Why do objects with greater mass have greater inertia?
More mass has to be moved or stopped
True or false, the position of a person's limbs determines the location of their centre of gravity?
True - this will affect their base of support and in turn their centre of gravity.
What is the path of a projectile through the air called?
Trajectory
What does it mean by sequencing of body parts?
Move the joints supported by the large muscles that are in the centre of the body first, before the joints supported by the small muscles that are found at the ends of the arms and legs.
What is a force that opposes movement?
Friction
How does Newton's 3rd law apply to walking?
Action force is your foot applying a force to the ground and the reaction force is the ground applying a force to your foot. Forces are equal
What 3 things affect the trajectory of a projectile?
Height of release, speed of release, angle of release
The greater the range of movement the........( finish the sentence)
the higher the speed of the extremities on release/contact
If an object weighed 44kg and had a force of 132N applied to it, would it accelerate faster, slower or the same than an object weighing 210kg with a force of 630N applied?
Same
F=mxa
132/44 =3 630/210=3