turning on a pivot

Presentation

•

Physics

•

8th Grade

•

Hard

Abeeha Tariq

Used 11+ times

FREE Resource

6 Slides • 4 Questions

turning on a pivot

By the end of the lesson you will understand

what is lever.

parts of lever

types of lever

examples of lever and the principle of moments

Lever

Archimedes studied levers scientifically.

what is a lever?

A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself.

Multiple Select

Read page no 190 and find the three points/parts of the lever

fulcrum

funnel

effort

load

Lever

A device that changes the direction in which a force acts is called lever
Lever acts as a force multiplier
Fulcrum : the support about which a lever turns
Effort: The force applied to the lever
Load: The object that you lift or the object that opposes the movement of lever.

Fill in the Blanks

How many types of lever do we have?

Can you name them?

Type answer...

Types of lever

F. FULCRUM IS IN MIDDLE
R. RESISTANCE OR LOAD IS IN MIDDLE
E. EFFORT IS IN MIDDLE

Moment

Turning effect produced by a force around a fulcrum is called moment.
Direction of movement is either clock wise or anticlockwise.

Law of moment

When an object is balanced (in equilibrium) the sum of the clockwise moments is equal to the sum of the anticlockwise moments. Force 1 x its distance from pivot = Force 2 x distance from the pivot.

Multiple Choice

A force of 4 N acts on a lever 2 m from the pivot.

What is the moment?

2 Nm

4 Nm

6 Nm

8 Nm

Multiple Choice

What will happen to the seesaw when both

people get on?

it will turn in a clockwise direction.

it will balance

it will turn in an anti-clockwise direction

it will turn either in an anticlockwise or

clockwise direction

turning on a pivot

By the end of the lesson you will understand

what is lever.

parts of lever

types of lever

examples of lever and the principle of moments

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