MHSB - 6 - Science :: Simple machines

MSCERT-Science-Grade 6

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[Contributor - Aasma Ahmad]

Objective: To teach the students about various simple machines like lever, inclined plane, pulley, wheel and axle, wedge and their maintenance and care.

Subtopics to be covered:

1. An inclined Plane
2. A wedge
3. A lever
4. A pulley
5. A wheel and axle
6. Maintenance of machines

Learning Outcome:

1. Students know that some machines are simple while others are complex
2. They know the different types of simple machines and their uses.
3. They also know that machines should be maintained properly to keep them in good working condition

Contributor - Kripa S]

http://cart.ebalbharati.in/BalBooks/pdfs/601020012.pdf#page=93 (Marathi Medium)

http://cart.ebalbharati.in/BalBooks/pdfs/603020012.pdf#page=93 (English Medium)

[Contributor - Kripa S]

http://easyscienceforkids.com/wp-content/uploads/2013/06/simple-machines.gif (simple machines 1)

http://images.tutorvista.com/cms/images/83/simple-machines.PNG (simple machines 2)

[Contributor - Kripa S]

1. Have small groups make their own pulley. Take two small spools of thread and put a pencil through the center. Then tie the ends of a length of string together to create a loop. Have two students hold the pencils and spools and spin them slowly to create a pulley system. Then have another student write a message and attach it to the thread using a paper clip. Use the pulley to pass the message from one person to the other.

2. Tape a pencil to a table. Then place a ruler on top of the pencil to create a lever. Place an object on one end of the ruler and press down on the other end to lift the object up. Try using objects of different weights. What happens? Is it easier or harder to lift heavier objects? Then have your child move the ruler so that the fulcrum is closer or farther away from the load. When does it become easier or harder to lift the load? Does the load ever become too heavy for the lever, and if so, where is the fulcrum?

[Contributor - Aditi Joglekar]

https://drive.google.com/open?id=1c6nQWo06zy940RUUfIuQJFHyeyRcy5gs

machines	मशीन्स	यंत्रे
effort	एफ्फोर्ट	बल
complex machines	कॉप्लेक्स मशीन्स	गुंतागुंतीची यंत्रे
simple machines	सिम्पल मशीन्स	साधी यंत्रे
inclined plane	इन्कलाइन्ड	उतरण
Archimedes Screw	आर्किमीडीज स्क्रू	आर्किमीडीज स्क्रू
wedge	वेज	पाचर
axe	एक्स	कुऱ्हाड
knife	नाईफ	सुरी
chisel	चीसेल	पटाशी
needle	नीडल	सुई
nail	नेल	खिळा
lever	लिव्हर	तरफ
load	लोड	भार
fulcrum	फलक्रम	टेकू
load arm	लोड आर्म	भारभुजा
effort arm	एफ्फोर्ट आर्म	बलभुजा
lever of first order	लिव्हर ऑफ फर्स्ट ऑर्डर	तरफेचा पहिला प्रकार
lever of second order	लिव्हर ऑफ सेकण्ड ऑर्डर	तरफेचा दुसरा प्रकार
lever of third order	लिव्हर ऑफ थर्ड ऑर्डर	तरफेचा तिसरा प्रकार
pulley	पुल्ली	कप्पी
wheel	व्हील	चाक
axle	एक्सल	आस
maintenance of machines	मेन्टेनन्स ऑफ मशीन्स	यंत्रा ची निगा

[Contributor - Aditi Joglekar]

https://drive.google.com/open?id=1zoHjeLs8htsgDZFqXAocC3H5Fir1KFLH

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