The slide show include topics: simple machines, force magnifiers, movement magnifiers, levers and its types. At the end there is a short review/test, so you can assess what you have learned.
I made this for grade 5 students.
3. What is a simple machine?
A Machine is any device
which helps to make
work easier for us.
Tools such as a screw
driver, a pair of tongs
and a pair of scissors are
called Simple
Machines.
5. FORCE MAGNIFIERS
Magnifier--- magnify
Machines which can
overcome a large force
using a small force are
called Force
magnifiers.
For example: Car jack.
6. MOVEMENT MAGNIFIERS
Movement--- distance
covered
Magnifier--- magnify
Machines which provide
a bigger movement from
a smaller movement are
called Movement
magnifier or Distance
multiplier.
7. LEVER- A SIMPLE MACHINE
A lever is a simple machine which turns about a fixed
point called the Fulcrum (F) when a force called
Effort (E) is applied to overcome a resisting force
known as the Load (L).
9. 1. FIRST CLASS LEVER
Fulcrum is between the
effort and load.
It produce a large force
from a small force (L>E).
Effort moves a longer
distance than the load.
Fulcrum is further away
from the effort than the
load to increase the
turning effect of force of
the effort.
10. L>E
Distance covered by
effort is more.
Fulcrum is away from the
effort.
12. 2. SECOND CLASS LEVER
Load is between the
fulcrum and effort.
It produce a large force
from a small force (L>E).
Fulcrum is further away
from the effort than the
load to increase the
turning effect of force of
the effort.
15. 3. THIRD CLASS LEVER
Effort is between the
fulcrum and Load.
It produce a large
movement from a small
movement.
The effort moves a
shorter distance but the
load moves a longer
distance.
A large force is used to
move a small load (E>L)
16. Produce large movement
from small movement.
Effort moves a shorter
distance, but load a
larger distance.
E>L
20. NOW, Fill in the given chart.
TYPE OF LEVER POSITION OF F, E AND L
1.
2.
3.
21. Fill in the given chart.
TYPE OF LEVER POSITION OF F, E AND L
First class lever F is between L and E
Second class lever L is between F and E
Third class lever E is between F and L
