WorksheetsTopic 4.3: Center of mass and levers
Total questions: 24
Worksheet time: 12mins
A second class lever has what in the middle?
Fulcrum
Resistance
Effort
What are the most common types of levers in the human body?
3rd class
2nd class
1st class
How many classes of levers are there?
1
2
3
4
You determine what class a lever is by the part that is in the middle.
True
False
If the fulcrum is in the middle of the lever what class is it?
1st
2nd
3rd
4th
If the effort is in the middle of the lever what class is it?
1st
2nd
3rd
4th
If the load is in the middle of the lever what class of lever is it?
1st
2nd
3rd
4th
What class of lever is shone in the picture?
1st
2nd
3rd
4th
A lever is a rigid structure (bone/bar) that rotates around on an axis.
True
False
Where is the fulcrum for levers on the human body located?
Muscles
Bones
Joints
Ligaments
You can improve stability by:
Increasing Base of Support
Increasing the mass of a body
Lowering the Centre of Gravity
Leaning forward
For a first class level, the fulcrum is placed
Between the effort/force and resistance/weight
Effort/force in the middle with fulcrum on one end and resistance/weight on the other
Resistance/weight in the middle with fulcrum and effort/force on the ends
when the knee is flexed in preperation to kick a ball, what is acting as the resistance/weight?
the knee
the thigh
the lower leg
torso
What lever is likened to a wheelbarrow?
2nd class
3rd class
1st class
when preparing to throw a javelin, the arm is straight behind the body. What muscle is acting as the effort/force
wrist extensors
tricep
bicep
deltoid
What type of lever?
1st Class
2nd Class
3rd Class
What type of lever?
1st Class
2nd Class
3rd Class
What type of lever?
1st Class
2nd Class
3rd Class
What type of lever is shown with this triceps pressdown?
1st Class
2nd Class
3rd Class
Is this person's center of mass changing throughout this timelapse?
Yes
No
Which is the technique that will raise ones body above their center of mass?
What technique is being shown for the high jump
Fosbury flop Technique
Scissor Technique
Flop Technique
Straddle Technique
