1. Please login to Nearpod and start copying the HW answers.
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2. Study Guide Answers
when a force is applied to an object and the object moves a distance
measures force in Newtons (N) or weight in grams (G) or pounds (lbs)
Newtons (N) or grams (G)/pounds (lbs)
A device that helps reduce the amount of force required to do work.
Lever, Pulley, Inclined Plane, Wheel and Axle
EFFORT
A lever is a rigid bar that is free to move around a fixed point, called a fulcrum.
A fulcrum is the point on which a lever rests or is supported and on which it pivots.
1) Increase the distance between the fulcrum & where the effort force/input force is applied OR 2) Decrease the distance of the weight from the fulcrum

3. APK
7tGosXM58

4. EQ:
How can a pulley be used to reduce the amount of FORCE required to do work?

5. Lesson Importance: WHY?
Why do you need to know: How can a pulley be used to reduce the amount of FORCE required to do work?
Think…
Tell your group your answer.
Write your answer on Nearpod.

6. Pulley A pulley is a grooved wheel W/ a rope running along the groove.
Pulleys change: (1) the amount of force applied/EFFORT & (2) the direction of the force applied. Copy diagram and labels

7. STOP
What 2 things do pulleys change? Write your answer on your I-pad/board & flip it.
(1) the amount of force applied/EFFORT &
(2) the direction of the force applied.

8. 3 types of pulleys
(1) Moveable pulleys: not attached & reduces the EFFORT
Ex: construction cranes, block & tackle systems copy
(1) Moveable pulleys: not attached & reduces the EFFORT
Ex: construction cranes, block & tackle systems copy illustration and labels

9. STOP
What is a moveable pulley? Write the definition on your I-pad/board & flip it.
a pulley not attached & reduces the EFFORT

10. (2) Fixed pulley: attached to a structure & reduces EFFORT
EX: flag pole, blinds
Copy illustration

11. STOP
What is a fixed pulley? Write the definition on your I-pad/board & flip it.
attached to a structure & reduces EFFORT

12. (3) Single fixed pulley: changes only the DIRECTION of the force
You pull down & weight goes up
Copy illustration and FIXED PULLEY LABEL in journal

13. 4 corners What does a single fixed pulley change?
GO to the correct corner AFTER you push in your chair.
A) direction
B) size
C) position
D) color A)

14. 2 Pulley SYSTEMS
(1) Single fixed pulley system: can be fixed or moveable…single moveable provides a mechanical advantage……single fixed provides NO mechanical advantage Or
(2) Two pulley system: one fixed & one moveable……if effort is applied upward… greater mechanical advantage than if effort is applied downward.

15. Independent Practice: Which pulley does not reduce the amount of effort? Copy the question in journal. Write your answer on Nearpod.

16. A
Copy the correct one in your journal.

18. D Copy the correct one in your journal.

19. Close: On your I-pad: Illustrate and label
1) a single fixed pulley and
2) a single moveable pulley
Then raise your hand to show me.

20. Fulcrum Video