ACTIVITIES PULLEYS:
1. 13kg I have to get water from a well. If the pulley is a pulley hoist 7, what force will have to do to get it up?.
Solution:
Formula: F = R / 2 ⁿ
x = 13 / 2 to 7 high
x = 13/256kg
2. I have to upload a load of 26kg with a movable pulley. What force have to do?
Solution:
Formula: F = R / 2
x = 26 / 2
x = 13kg
3.Tengo to lift a weight of 0.8 kg. If it is a simple pulley how strong I have to do?
Solution:
Formula: F = R
0.8 = R
4. I have a hoist 6 pulleys. If I have to lift weights 20kg. What force have to do to get it up? And if the hoist is 3 Will the double pulleys and why?
Solution:
Formula: F = R / 2 ⁿ
x = 64 / 2 increased to 6
x = 64 / 128
x = 0.5kg
No:
x = 64 / 2 ³
x = 64 / 16
x = 4kg
5 . With a movable pulley with which I have to lift a weight of 0.6kg. What force have to do to get it up?
Solution:
Formula: F = R / 2
x = 0.6 / 2
x = 0.3kg
ACTIVITIES: TWO SYSTEMS FRICTION PULLEYS
1. I have a 5cm diameter pulley and a 20cm. If the small tour at a rate of 8rpm How fast will turn up?
Solution:
Formula: V ₁ · d ₁ = V ₂ · d ₂
8 • 5 = 20 · x
40 = 20 · x
x = 40 / 20
x = 2rpm
2. I have two pulleys that are connected by a rubber band. If the two go at a speed of 15rpm, and one of them has a diameter of 6cm What diameter will have the other? And if the diameter of 6cm, instead of going to go to 15rpm diameter 18 What will the other?
Solution:
Formula: V ₁ · d ₁ = V ₂ · d ₂
15 • 6 = 15 ° x
The other pulley measured the same
V ₁ · d ₁ = V ₂ · d ₂
18 • 6 = 15 ° x 108 = 15 °
x x = 108 / 15 x = 7.2cm
3. A pulley is 25cm in diameter at a speed of 25rpm.Si has a pulley that is attached to a 50rpm speed "Its diameter is 50? justify.
Solution:
Formula: V ₁ · d ₁ = V ₂ · d ₂
25 • 25 = 50 ° x
625 = 50 ° x
x = 625 / 50
x = 12.5cm
No 4. If a 36cm diameter pulley which is connected to one of 45cm, it will speed 93rpm how fast will the other?
Solution:
Formula: V · d ₁ ₂ ₁ = V ·
₂ d x · 45 = 93 · 36
x · 45 = 3348
x = 3348 / 45
x = 74.4rpm
5. friction pulleys I have two of them turned to 16rpm and measures 4cm 8cm.Si the other measures how fast will it go?
Solution:
Formula: V ₁ · d ₁ = V ₂ · d ₂
x · 4 = 16 • 8
x • 4 = 128
x = 128 / 4
x = 32rpm
