This document provides an overview of topics related to rates and work, including distance, speed, and time; average speed; relative speed; to and fro motion; and work, time, and efficiency. It includes definitions and formulas for these concepts, as well as example problems and solutions. The document aims to teach the relationships between distance, speed, and time when motion is constant, how to calculate average speed, how to determine relative speeds of objects moving in the same or opposite directions, and how to solve word problems involving work completed over time by individuals or groups.
IT IS AN IMPORTANT TOPIC FOR ALL COMPETITIVE LEVEL EXAMINATIONS OR GOVT EXAMINATIONS. IT IS VERY HELPFUL FOR THOSE WHO ARE APPEARING FOR THOSE JOB EXAMINATIONS,
This teaching Material is for Grade - 9 Science. Here we are trying to cover Machine from Unit 3. We provide teaching material at no cost. Please don't forget to recommend/reference our teaching Material after use.
This material is for PGPSE / CSE students of AFTERSCHOOOL. PGPSE / CSE are free online programme - open for all - free for all - to promote entrepreneurship and social entrepreneurship PGPSE is for those who want to transform the world. It is different from MBA, BBA, CFA, CA,CS,ICWA and other traditional programmes. It is based on self certification and based on self learning and guidance by mentors. It is for those who want to be entrepreneurs and social changers. Let us work together. Our basic idea is that KNOWLEDGE IS FREE & AND SHARE IT WITH THE WORLD
Interest Assignments
Partnership Assignments
Percentages Assignment
Profit and Loss
Assignments
Proportion Assignments
Set Theory Assignments
Time and Distance Assignments
Time and Work Assignments
Permutation Assignments
Allegation Assignments
AP,GP Assignments
IT IS AN IMPORTANT TOPIC FOR ALL COMPETITIVE LEVEL EXAMINATIONS OR GOVT EXAMINATIONS. IT IS VERY HELPFUL FOR THOSE WHO ARE APPEARING FOR THOSE JOB EXAMINATIONS,
This teaching Material is for Grade - 9 Science. Here we are trying to cover Machine from Unit 3. We provide teaching material at no cost. Please don't forget to recommend/reference our teaching Material after use.
This material is for PGPSE / CSE students of AFTERSCHOOOL. PGPSE / CSE are free online programme - open for all - free for all - to promote entrepreneurship and social entrepreneurship PGPSE is for those who want to transform the world. It is different from MBA, BBA, CFA, CA,CS,ICWA and other traditional programmes. It is based on self certification and based on self learning and guidance by mentors. It is for those who want to be entrepreneurs and social changers. Let us work together. Our basic idea is that KNOWLEDGE IS FREE & AND SHARE IT WITH THE WORLD
Interest Assignments
Partnership Assignments
Percentages Assignment
Profit and Loss
Assignments
Proportion Assignments
Set Theory Assignments
Time and Distance Assignments
Time and Work Assignments
Permutation Assignments
Allegation Assignments
AP,GP Assignments
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2. Topics
• Distance, speed and time
• Average Speed
• Relative Speed
• To and fro motion
• Work, time and efficiency
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3. Distance, Speed and time
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Constant Time Speed Distance
Relationship
between the other
two variables
D varies directly
with S
D1/D2 = S1/S2
D varies directly
with T
D1/D2 = T1/T2
T varies Inversely
with S
T1/T2 = S2/S1
4. Problem
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Claire ran the first 10 kilometers of a 20-kilometer race at a constant
rate of 12 kilometers per hour. If she completed the entire 20-
kilometer race in 1 hour, at what constant rate did she run the last 10
kilometers of the race, in kilometers per hour?
A. 60
B. 50
C. 75
D. 45
E. 120
Answer : Option A
5. Average Speed
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𝐴𝑣𝑒𝑟𝑎𝑔𝑒 𝑆𝑝𝑒𝑒𝑑 =
𝑇𝑜𝑡𝑎𝑙 𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒
𝑇𝑜𝑡𝑎𝑙 𝑇𝑖𝑚𝑒
5
When the total distance is in two parts and the distances covered are equal, let
the speeds be a and b over the two distances.
𝐴𝑣𝑒𝑟𝑎𝑔𝑒 𝑆𝑝𝑒𝑒𝑑 =
2𝑎𝑏
(𝑎 + 𝑏)
6. Problems
Chris drove from his house to office at 40 miles per hour, and
returned by the same route at 60 miles per hour.
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Answer : Option B
Quantity A Quantity B
Chris’ average speed for the
round trip, in miles per hour
50
7. Problems
Reek travels the first 2/3rd of a trip at 20 miles per hour (mph)
and the remainder of the trip at 30 mph. What is his average
speed over the whole journey?
A. 22 mph
B. 23 mph
C. 22.5 mph
D. 21.5 mph
E. Insufficient information
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Answer : Option C
8. Relative Speed
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When in same direction,
𝑅𝑒𝑙𝑎𝑡𝑖𝑣𝑒 𝑆𝑝𝑒𝑒𝑑 = 𝑆𝑝𝑒𝑒𝑑 𝑓𝑎𝑠𝑡𝑒𝑟 − 𝑆𝑝𝑒𝑒𝑑 𝑆𝑙𝑜𝑤𝑒𝑟
When in opposite direction,
𝑅𝑒𝑙𝑎𝑡𝑖𝑣𝑒 𝑆𝑝𝑒𝑒𝑑 = 𝑆𝑝𝑒𝑒𝑑 𝑓𝑎𝑠𝑡𝑒𝑟 + 𝑆𝑝𝑒𝑒𝑑 𝑆𝑙𝑜𝑤𝑒𝑟
9. Problems
A terrorist hijacked a train heading due north. At exactly the same time, a
police car located 100 miles south of the train started driving north
toward the train on an adjacent roadway parallel to the train track. If the
train travelled at a constant rate of 60 miles per hour, and the police car
travelled at a constant rate of 90 miles per hour, how long after the
hijacking did the police car catch up with the train?
A. 3 hours and 15 minutes
B. 3 hours and 20 minutes
C. 2 hours and 45 minutes
D. 3 hours
E. 3 hours and 30 minutes
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Answer : Option B
10. Problems
Two horses begin running on an oval course at the same time.
One runs each lap in 15 minutes; the other takes 12 minutes to
run each lap. How many minutes after the start will the faster
horse have a one lap lead?
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Answer : 60
11. To and fro motion in a straight line
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Two cars, A and B, started simultaneously from opposite ends of a
960-yard track. Car A travelled at a constant rate of 60 feet per
second; Cart B travelled at a constant rate of 36 feet per second.
After how many seconds of travel did the two carts collide? (1 yard
= 3 feet)
A. 100
B. 30
C. 10
D. 20
E. 25
12. Work, time and efficiency
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Work = time x efficiency
12
14. Problems
Working alone at its own constant rate, a machine seals k
cartons in 8 hours, and working alone at its own constant
rate, a second machine seals k cartons in 4 hours. If the
two machines, each working at its own constant rate,
together sealed 6k cartons in t hours.
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Quantity A Quantity B
t 15
15. Problems
Twelve workers pack boxes at a constant rate of 120 boxes in 8
minutes. How many minutes would it take 24 workers to pack 180
boxes, if all workers work at the same constant rate?
(A) 12
(B) 8
(C) 14
(D) 6
(E) 10
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Answer : Option D
16. Wage proportional to efficiency
A and B can do a project in 12 and 15 days
respectively. They were told to complete the project in
5 days and were paid $ 1440. They took the help of C
and completed the work in time. Find C’s share in the
total money earned by them.
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1) 250 2) 360 3) 390 4) 450
17. Wage proportional to amount of work done
A,B and C can complete a work in 10, 20 and 30 days
respectively when they work individually. All three started
simultaneously. After 3 days A left, After two more days B left
and C completed the remaining work alone. If the total work is
for $ 6000. Find the amount received by C.
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1) 2700 2) 2500 3) 3500 4) 550