Name____________________Rm#____Table group #____

Spring Scale Friction

Use a spring scale to measure the force of friction and gravity.

Pull the book across the surfaces described below. Record the grams of force.

straight up_______grams. across table________ across rug_______ up a 45º ramp_______

across table w/wheels_______across rugw/wheels_______ up a 45º ramp w/wheels______

QUESTIONS:

1. Which case took the most force to move the book? ______________ Least?_____________

2. What was the difference in the amount of force used to pull the book across the table with and without wheels?

(Across table) - (across tablew/wheels) = ?_________

3. Why did it take more force to pull the book across the rug than the table?

________________________________________________________________________

4. What were the 2 kinds of forces that you measured when you pulled the book up the ramp? _________________ & _______________

Back to Hands On Science in Action

SCIENCE LESSONS

Principal	Calendar	PTA	GATE
Science	Classrooms	Resource	Physical Education
Computer	School Activities	Library	Office