7. Ideal Mechanical Advantage (MA)
of Nifty Lifter
Ideal Mechanical Advantage (IMA):
5=Mechanical Advantage of Inclined plane
.55m (inclined plane length) ÷ .11M (Inclined plane height)= 5 Ma
3=Mechanical advantage of Block and tackle Pulley system
5 X 3= 15 Total ideal mechanical advantage
8. Efficiency of Nifty Lifter
0.27 Joules (Output Work)÷
0.84 Joules (Input Work)
X 100%
=
32%
9. Step by Step Explanation of how the
Machine Works
1st when we drop the input force (PET)
it tugs on the string. Since the string is
connected to a series of pulleys it
eventually pulls the small car up the ramp.
When the car is going up rolling friction is
in motion. A combination of the rolling
friction and pulleys allows the 1 newton
weight pull up 3 newtons.
10. Justification of Design
Why did you create the design you did
with the machines you did?
I realized that making a simple machine
was actually simple since I used 2 of the
easiest simple machines so that when we
would create the actual machine it would
not be much of a hassle completing it on
time.
11. Bibliography
Padilla, MJ, Miaoulis, I., Cyr, M., & Kahan, page (2002) Motion, forces,
and Energy . Needham, Mass:. Prentice Hall
The Mechanical Advantage of Simple Machines. (n.d.). The Mechanical
Advantage of Simple Machines. Retrieved March 13, 2014, from http:
//iqa.evergreenps.org/science/phy_science/ma.html
