Забыли?

?

# Spring

код для вставкиСкачать
```Topic
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Displacement
Vectors
Kinematics
Graphs
Energy
Power
Springs
Field of Vision
Colors
Concave mirrors
Convex mirrors
Refraction
Lenses
Optical Power
Slides Minutes
9
27
13
39
13
39
10
30
10
30
5
15
4
12
3
9
7
21
3
9
7
21
4
12
5
15
10
30
6
18
As illustrated below, the distance a spring is stretched is called
the вЂњelongationвЂќ. Robert Hooke was the first to discover that the
spring force is directly proportional to the elongation. Today, we
call this law HookeвЂ™s Law.
The formula for the spring is: FS = kx
пЃ… (HookeвЂ™s Law)
Where: FS = the spring force (N)
k = the spring constant (N/m)
x = the elongation (m)
Click
When the spring force (FS) is plotted versus the elongation (x) of
the spring, the resulting graph is a linear relation. The slope of
the curve represents the spring constant while the area under
the curve represents the potential energy stored in the spring.
Click
Springs Slide: 7. 1
When the spring force is plotted versus the elongation of the
spring:
a) How do you determine the spring constant (k) from the graph?
By finding the slope of the plotted line.
b) How do you determine the potential energy (EP) stored in a
spring from the graph?
By finding the area under the slope.
Click
Springs Slide: 7. 2
The graph on the right represents the
force-compression graph of an ideal spring.
Determine the spring constant.
Click
Springs Slide: 7. 3
Jim wants to compress a coil whose spring constant is 120 N/m.
To do so, he uses a lever attached in such a way that the
actual mechanical advantage (AMA) is 3 as illustrated below.
How much force must Jim apply in order to compress the spring
a distance of 50 cm?
Note that the resistance force = the spring force
Click
Springs Slide: 7. 4
The graph on the right was obtained by
applying various weights to a spring.
The spring is then attached to a 5.0 kg
cart and stretched 0.40 m by an applied
force of 25 N (as illustrated).
Note that to find the spring constant,
0.40 m
Determine the frictional force between
we need to invert the slope from the
the surface and the cart as the cart
given graph because k = F/x. FA = 25
was stretched.
N
5.0 kg
Step-1 Find the spring constant (k)
Step-3 Find the frictional force (f)
Step-2 Calculate the spring force
Given
Click
Springs Slide: 7. 1
вЂ¦ and good luck!
```
###### Документ
Категория
Презентации
Просмотров
49
Размер файла
2 063 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа