projectile motion Flashcards
what is projectile motion
refers to the movement of an object of an object or a body through the air
what is horizontal displacement
the shortest distance from the starting point to the finish point in a line parallel to the ground
what are the three factors that affect horizontal displacement
angle of release
speed of release
height of release
if the release height and intended landing height is the same what is the optimal angle of release for an object
45 degrees
if the release height of an object is below the landing height the release angle needs to be…
greater than 45 degrees to maximise displacement
an example of when the release height of an object is below the landing height
shooting a basketball
if the release height is greater than the landing height the optimum angle of release needs to be…
less than 45 degrees
an example of when the release height is greater than the landing height
throwing a shot putt
what is the angle of release determined by
the height of the performer
strength of the performer
keeping the angle of release smaller means ..
more speed can be generated
a world class shot putter will release between which angles
26 and 38 degrees
how does the speed/velocity of release affect the horizontal displacement
the greater the velocity of a projectile the greater the horizontal displacement travelled
how can the speed of release be increased for throwing sports
add a run up, shift or rotation
why does increased speed of release mean greater HD
because if the mass of the performer stays the same, and the velocity increases it will mean that the momentum would increase which will enable a longer flight which results in greater HD
how does the height of release affect HD
the greater the release height the increased HD
if the angle of release and velocity were the same a taller person would throw further/shorter than a shorter person
further
what is the impact of gravity on height of release in relation to HD
the force of gravity is constantly acting on the mass of a shot put
therefore technically the shot putter should try and release as high as possible to maximise HD
name 3 factors that affect the distance the shot travels (1)
height, speed and angle of release
once projectiles are airborne they are only subject to …. (2)
gravity and air resistance
air resistance defines …..
the projectile’s flight path
gravity remains the ….. but after time gravity can turn …….. components into …….
remains constant
turn positive vertical into negative components
what is true parabola
is a symmetrical and uniformed curve from the highest point
what type of projectiles produce a true parabola and why
ones with a large weight force have a smaller air resistance and therefore follow a true parabolic flight path eg a shot putt
what is distorted parabola and what kind of objects produce it
an asymmetrical curve
objects with lighter mass will be heavily affected by air resistance eg a shuttle continues in its flight then AR causes it to deviate from a true parabola into a distorted one
when drawing vectors on a flight path which remains constant and which changes
horizontal component remains constant and vertical component decelerate upwards and then accelerate downwards
pages 9-11 need looking at for diagrams
