Lever Systems

Question 1

The lever is the

Answer 1

Bone

Question 2

The fulcrum Is the

Answer 2

joint

Question 3

The effort is the

Answer 3

Force provided - muscles

Question 4

The load is the

Answer 4

Weight of the body of object being held

Question 5

The fulcrum is represented as a

Shape

Answer 5

Triangle

Question 6

The effort is represented as a

Shape

Answer 6

Arrow - pointing in direction that effort is applied

Question 7

The load is represented by a

Shape

Answer 7

Square

Question 8

The lever is represented as a

Shape

Answer 8

Line

Question 9

Describe the first lever

Answer 9

Fulcrum is between the load and the effort

Question 10

Describe the second class lever

Answer 10

The load is between the effort and the fulcrum

Question 11

Describe the third class lever

Answer 11

The effort is between the fulcrum and the load

Question 12

An example of a first class lever

Answer 12

Extending the arm at the elbow for a chest push in netball
The effort is the tricep 
The load is the ball 
The fulcrum is the elbow joint (hinge)
The lever is the humerus, ulna

Question 13

An example of a second class lever

Answer 13

During calf raises or a jump
Ball of the foot is the fulcrum
Effort is gastrocnemius
The load is the weight of the body

Question 14

An example of a third class lever

Answer 14

Bicep curl
Fulcrum is elbow joint (hinge)
Load is the weight
Effort is the bicep

Question 15

Most common lever system for sport

Answer 15

Third class lever

Question 16

Two functions of levers

Mechanical advantage

Answer 16

Move load faster and further

Move a heavier load

Question 17

Calculation to work out mechanical advantage

Answer 17

Output force divided by input force

Question 18

What lever are mechanical advantages

Answer 18

First and second class levers

Question 19

Plantar flexion is linked to what class lever

Answer 19

Second

Question 20

Define mechanical disadvantage

Answer 20

Input of the lever is greater than the output

You are putting in more effort than you get out

Question 21

What lever is mechanical disadvantage

Answer 21

Third class lever

Question 22

Advantages and disadvantages of a third class lever

Answer 22

👍🏻
Speed and a wide range of movements

👎🏻
Greater force required to move the load

Question 23

Advantages and disadvantages to first class levers

Answer 23

👍🏻 stable and strong

👎🏻 slow and limited flexibility

Question 24

Advantages and disadvantages of a second class lever

Answer 24

👍🏻 force given allows heavy loads to be lifted

👎🏻 small range of movements and can’t move quickly

Question 25

Identify lever system when kicking a ball at the knee

Answer 25

Third class lever system

Question 26

Explain mechanical disadvantage of the lever system at the ball of the foot in a sprint start

Answer 26

A second class lever operates the ball is the foot
Which means it cannot lift the load of the body at a high speed
Making it hard to get a fast start

Question 27

Reason why for second class levers advantages and disadvantages

Answer 27

Due to the load being closer to the fulcrum than the effort

Question 28

Reason why for third class levers advantages and disadvantages

Answer 28

Due to the effort being closer to fulcrum than the load