Name______Mrs. Delaney Science 6.______Date______REDO only the questions that you had incorrect on the assessment.

Investigation 1: Levers REDO

1. What is another name for the pivot point in a lever system? ______

Draw a picture of a lever system and label the pivot point with the term recorded above.

2. What unit is used to measure force? ______

Define force-______

6. Explain why it is helpful to use a lever? ______

Draw a picture of a lever being used to lift your teacher with the least amount of effort needed. 10. Draw and label all parts of a spring scale. Mark a measurement of 6.4 N. What increments of measure make up grams? Answer below. Bold lines______Light lines______What increments of measure make up newtons? Answer below. Bold lines______Light lines______

13./14. Write the relationship about load….. ______Draw a picture to demonstrate the relationship.

15.Using the graph on the test…answer the following questions. a. If the effort is applied at 15 cm from the fulcrum how much effort is need to lift the load? ______b. If the effort is applied at 10 cm from the fulcrum how much effort is needed to lift the load? ______c. If it takes 3.5 N of effort to lift the load, how far would the effort be from the fulcrum? ______d. What does this graph show you about the relationship between the amount of effort needed and its distance from the fulcrum? ______e. How much does the load weigh if LOAD is now positioned at 10 cm from the fulcrum? ______