LEVER | SCIENCE FORM 2

LEVER

Cikgu Nurul Fadhilah | MRSM Alor Gajah

DAILY CHECK IN

• Lever
• Classification
• Moment of Force
• Priciple of Moments

Lever

• Allows is to do work easily and
2. allows us to use minimal force to do work.

Classifications of levers

01 02 03

First class lever Second class lever Third class lever

Classification

The Moment of The Moment of Force
Force
effect produced by a f
is called the moment of force.

The moment of force allows us to
do work easily.

The moment of force depends on

•
•

Moment of force = Force (N) × Perpendicular distance from the pivot to the force (m)

clockwise or
anticlockwise

Calculate the moment Show
of force. your
working

Calculate the moment Show
of force. your
working
The force used to open
the lid of a can is 10 N
using a spoon of length

15 cm.

quiz

Which position
requires more
effort? Tick your
choice.

quiz

Which position
results in greater
moment of force?
Tick your choice.

Moment of force will increase if the:

01 Force:
02 Perpendicular distance

Proove it!

Now, I AM

Principle of moment

quiz

Figure shows two
children sitting on a
see-saw. What is the
distance of Jia Yin
from the fulcrum so
that the see-saw is
balanced?

Image uploaded by Hariz

Image uploaded by haizulhakimi

Image uploaded by Allis Umaira

Image uploaded by Filzah Iffah Sufi

Image uploaded by Nurhanna Husna

Image uploaded by Farhaaa

Image uploaded by Adib

Image uploaded by Putri NurFasihah

Image uploaded by Norman Bahry

Image uploaded by Liyana

Image uploaded by Ellyza

quiz

Figure shows a man trying
to move a boulder weighing
100 kg using a small stone
as a fulcrum. The distance
between the boulder and the
small stone is 0.5 m and the
distance between the man
and the small stone is 2 m.
Calculate the effort
required by the man to
move the boulder.

Image uploaded by Hariz

Image uploaded by Nurhanna Husna

Ready ... Answer all questions.
All the best!
Check your understanding.



QUESTION 1

Figure 1 shows a nail being removed from a
plank using a hammer. If a force of 5 N is
required to remove the nail, what is the
moment of force required to pull the hammer

in the direction shown in Figure 1?

75 N cm 0.75 N cm
75 N m 0.75 N

Leader Board Results

QUESTION 2

What is true about a lever?

a rotating curve plank. it is a complex machine
not related to force
a bar that rotates on a fixed point.

Leader Board Results

QUESTION 3

Lever ...
• Allows is to do work easily and
2. Allows us to use minimal force to do work.

yes
no

Leader Board Results

QUESTION 4

Lever has

2 classes 3 classes
1 class
4 classes

Leader Board Results

QUESTION 5

This is a ...

1st class lever
2nd class lever

Leader Board Results

QUESTION 6

Determine value of d.

300 m 3 cm
3m
1.5 m

A few things that

I learned today:

I feel confused: