L28

Question 1

Lever Example: Scissors

Answer 1

Force= handles
Axis= middle of scissors where the 2 cross
Resistance= whatever your cutting

Question 2

Lever Example: Door

Answer 2

Force: pushing it open/ closed
Resistance:: Door
Axis: Hinges

Question 3

Lever Example: Deltoid causing shoulder abduction

Answer 3

Resistance: Arm
Force: Muscles
Axis: Joint

Question 4

Mechanical Advantages of a Lever

Answer 4

> 1: mechanically advantageous (1st and 2nd class)
<1: mechanically disadvantageous (3rd class)

Question 5

Static Equilibrium

Answer 5

a static case involves systems at rest or moving at a constant velocity
-all of the torques in a system must sum to 0

Question 6

Counterclockwise vs Clockwise torque

Answer 6

Counter: Positive
Clockwise: Negative

Question 7

Torque Equation:

Answer 7

T= F x r
T= torque
F= force in NEWTONS
R= radius

Question 8

Torque needs to equal

Answer 8

0
-subtract them so that it equals 0 to find how much torque is needed