Innovative Investigations: Block and Tackle

DATE: 22 Zilhijjah 1433/8 Nov. 2012

Block and Tackle

AIM:
To build a simple block and tackle and a pulley with hangers and investigate how they work and which is easiest.

load; plasticine

MATERIALS:
- 3 coat hangers
-  plasticine
- tape
- scissors
- pencil
- paper cups


METHOD:

cup holding load

First we used the paper cup and yarn to make a bucket to hold our load.

Then we made the Block and Tackle with two hangers, some yarn and tape; we tied one end of the yarn to one hanger and taped it in place. Then we wound the yarn around both hangers and held on the the other end of the yarn to pull. The bucket was attached to the lower hanger.

The second pulley was made by attaching the bucket to one end of the  yarn and looping the other end over the curve of the hanger.


RESULTS:

Block and tackle in action

load up

simple system pulley using a hanger

OBSERVATIONS:
1.Which pulley system worked better?
The simple pulley.

2.Why?
It could be pulled more easily.

3. Did both pulleys need the same amount of force to work?
No, the block and tackle needed more force to move (it was difficult to use too).

 4. Which needed more force?
The Block and Tackle.

5.Why did it need more force to lift the load?
The yarn had to move over more distance to work and had to the lower hanger as well.


(Design of Block and Tackle taken from :Wheels, Pulleys and Levers"  pulished by Pustak Mahal, India)

Masha'Allah Moments

Things are constantly changing around us; the weather gets cooler, the days get shorter, the children get taller or rounder- we take many of these changes for granted and some seem mundane, other things happen in a blink of an eye, so if your nodding off you'll miss it. As we keep plodding through our days, things will happen to give us a "heads up!" so here are a few more recent things from our home:

- IBAP (11 yrs) was doing math on Khan Academy - we're revising multiplication and division, when I found  him adding and subtracting negative numbers. This was a surprise because we haven't begun that topic yet and he was getting the answers right. I asked him if he had watched a tutorial on it, he explained he hadn't, and when he first attempted the set of questions he got them all wrong. So how did he figure them out now? He was forming a number-line in his mind and moving "left" and "right" on it ; 9- (-4) = 5!



-SBAP (4yrs) can now back flip onto the bed Subhan'Allah, he is now trying to land on his feet. He has also begun horse riding lessons, accompanying QBAP (13yrs).

-BBAP, our little Babujee (5 months) can not sit up, but he will rush across the bed, pushing himself forward with his feet and getting on his knees and then almost bouncing forward to reach for tempting books or cell phones placed beyond his reach Masha'Allah.

-ZBAP  (2yrs) has proved to be a natural story teller, Masha'Allah, his stories often incorporate our current events, lately his stories include cows and goats, other than his usual stories of "guy on a motorcylce", "falling down from the ladder', electric guy (electrician), "plumbber" and sharks and whales (after watching "Free Willy"). Though his stories border on violent and tragic, he himself does not like loud noises of scenes of violence in programs, he labels them as "noisy noisy, scary" and leaves the room.

Innovative Investigations: Measuring Distances

AIM :
To find out which type of object will fall the furtherest distance and which type will fall the least distance.

MATERIALS:
1. ball
2. plastic spoon
3. metal spoon
4. paper
5. shirt
6. measuring tape
7. electric tape

METHOD:

tape marking standing place

A piece of electric tape was taped to the ground to mark the place from where the objects would be thrown. The objects were thrown one at a time. Then we measured how far it fell. We tried to exert the same force for each object. 

signalling all is ready and subject can now throw object

measuring the distance the object fell

measuring tape

RESULTS:

 

OBSERVATIONS:

1. Was force exerted the same?

Yes

2. Which object fell furtherest distance?

The ball.

3. Which object fell the least distance?

Paper.

- Paper is light so it did not fall far and often spiralled to the ground.

 CONCLUSION:

We learned that the smaller an object is the further it goes. The distance an object falls is determined by velocity/ speed, shape and size of the object (Air Resistance.)  

Creative Characters (Bookworm Club Competition)

Our Bookworm Book Club is currently reading "Charlie and the Chocolate Factory". Once the first four lucky golden ticket winners were revealed in the book, our Book Worms were asked to write about a fictitious child who would fit in with the first four nasty winners and tells us how the child found the ticket. They were given a week to prepare for the competition.

HBAP (7yrs) was very excited, she brought out a white board and marker and asked Ummi to help write out her thoughts. She first considered writing about a child who played too much cricket and the following day changed her mind and thought out a story about a boy who didn't like to bathe. She then asked Ummi to write it out so that she could copy it on to paper. She then wrote it out twice to make it neat, still not satisfied with her own handwriting she asked Ummi to write it out.
This is HBAP's story in her own handwriting:

TED KHAN

It continues-One day his parents said they would give him money to buy chocolate if he had a bath. He washed his hands and face with soap, and they gave him the money. Then he went to the chocolate shop and he bought a chocolate. He went home and he opened it and he saw a golden ticket inside.



MBAP (9yrs) decided not to write anything because he felt he couldn't possibly win, but was quick to suggest stories for others to write, with some persuasion he finally put together a story just before the club session began.  His story:

JESSE MEANIE

Jesse was an only child who did not know how to share. When his neighbors play cricket and their ball flies into his house he takes it and hides it in his sleeves and tells them it did not come there .When he plays with them and gets out he stops playing and goes whit his ball so no one else can play. When Jesse heard about the golden ticket he bullied small children to give him their chocolate .once he found a ticket he left the little children alone.           

IBAP (11yrs) eagerly put his story together and wrote it out without a fuss Masha'Allah!

IBAP's Story:

PETER   POSTOPIA

Peter Postopia loves his PSP. He plays on it all day long. Even when he wakes up he plays on his PSP while his mother feeds him breakfast. At school when his teacher is checking other children’s work, he uses it under his desk. Peter plays with it till he falls asleep so it stays in his hand while he is asleep. When he heard about the golden tickets he started eating chocolate while playing on his PSP, till one day he found a ticket. Peter then stopped eating chocolate to concentrate on his games.

After all the club members had presented their stories a secret ballot was carried out to ascertain the competition winner; Masha'Allah HBAP won! She received a Hajj activity book as a prize.

To read more about the competition and read the other children's entries visit:
http://karachi-bookworms.blogspot.com/2012/10/charlie-and-chocolate-factory-4.html