Transcript Torque

TORQUE
• An applied force that
may cause an object
to rotate.
• The size of the force
and where it is
applied determine the
size of the Torque.
  rF sin 
= 𝑟⊥ 𝐹
Units: Newton•meters = Nm
Pivot
Fsin
r = lever arm

F
Which force will produce the most
torque?
E
B
A
D
Example 1
4m
0.5m
40N
2m
?
Example 2
12m
4m
3kg
1.5m
?
12N
Example 3
m=50kg
12m
x
m=80kg
4m
Example 4: Calculate the tension in the string.
60º
T=?
5m
m=12kg
m=20kg
Example 5: A ladder has a mass of 15kg rests against a
smooth wall. A painter who has a mass of 78kg stands on
the ladder as shown. What frictional force must act on the
bottom of the ladder to keep it from slipping
5.6m
4m
70˚