WorksheetsFinal SL Hes 102
Total questions: 40
Worksheet time: 20mins
What type of work is being done to my hamstrings when flexing my knee?
Positive
Negative
None
When throwing a ball in the air, when will KE=PE?
At peak height
When height is 0m
Half peak height
Half total air time
What is strain energy?
The capacity to do work
PE due to objects position
work due to motion of an object
PE due to deformation
What is power?
transfer of force through a distance
the rate of speed
the rate of work being done
transfer of space over time
A seesaw is an example of what type of lever?
Class 1
Class 2
Class 3
Class 4
it's not a lever
What type of external force has only angular motion?
eccentric
centric
force couple
isometric
Centric force involves change in what type of motion
neither linear or angular
angular only
both linear and angular
linear only
Select all options that would increase stability
Smaller base of support
lower centre of gravity
higher PE
A heavier object
What happens if you push on object which has a CG below base of support?
Falls over
Remains stable
it flys
Sometimes falls over depending on other factors
true or false, arc length is longer than chord length
Which type of lever has the load between the effort and the fulcrum?
Class 1
Class 4
Class 2
Class 3
As duration of activity increases, the power output which can be sustained
Decreases exponentially
decreases sigmoidally
decreases linearly
stays the same
Small movement near the joint produced __x greater linear displacement at the wrist
5
6
7
8
9
Which of the following is a centre seeking force?
Angular acceleration
Centripetal acceleration
Tangential acceleration
Instantaeous linear velocity
average linear speed
If two objects have the same angular velocity, but object two has a larger radius, which object has a greater centripteal acceleration
object 1
object 2
they are both the same
neither
what is angular kinetics
the description of angular motion
the description of linear motion
the causes of angular motion
the causes of linear motion
True or false, moment of inertia is a vector
True
False
True or false, The moment of inertia through the centre of gravity and the eccentric axis are perpendicular to eachother
True
False
True or false, Ib > Icg
True
False
What is the direction of angular momentum
cw/ccw
left/right
tangent to circular path
towards axis of rotation
which of the following examples would total angular momentum be zero
running in a circle
running around the turn of a track
running in a straight line
standing still
running in zig zags
what equation do we use for a non-rigid object when applying newtons second law to angular momentum
H=Iw
Net T=Iα
α= Net T/I
Net T= ΔH/Δt
which of the following will not cause a change to angular momentum
Angular velocity speeding up
changing direction of axis of rotation
angular velocity slowing down
constant moment of inertia
mass staying the same
which of the following are not a principal stress?
tension
torsion
compression
shear
bending
Which type of stress us produced within an object to stop it from being pulled apart?
shear
tension
compression
bending
Bruising is the result of what stress
shear
tension
compression
torsion
Tensile stress can cause what injury
sprains
blisters
joint dislocations
crushing fractures
muscle tears
at what point will permanent deformation first occur
in elastic region
ultimate strength
failure strength
yield strength
True or false, bone is best at resisting shear stress
True
False
True or false, tendons are stronger than ligaments
True
False
True or false, motor units are recruited from largest to smallest
True
False
Which of the following is not a basic type of neuron
Motor
Sensory
Cranial
Interneuron
What is rate coding?
the number of active motor units
motor units being recruited from smallest to largest
the overlap of actin and myosin
The discharge rate of active motor units
Which of the following are not a function of skeletal muscle?
Movement
peristalsis
Ca2+ production
Muscle pumps
Protection
True or false, muscle length design involves fibres in-parallel
True
False
Linear and angular motion are combined to make:
Curvelinear Motion
Rectlinear Motion
General Motion
Projectile Motion
True or false, friction force increases as surface area in contact increases
True
False
Select all scalar quantities
Speed
Velocity
Mass
Time
Distance
What is rectilinear motion
All points on an object move same distance, direction, and time along an arc
All points on an object move same distance, direction, and time along a straight line
All points on an object move in a circular path about a fixed axis
A combination of linear and angular movements
True or false, an inelastic collision has a coefficient of resitiution closer to 0
True
False
