27. Time and Work Flashcards
What is the formula for work?
Work = Force × Distance
What is the formula for time?
Time = Work / Rate
What is the formula for rate?
Rate = Work / Time
How do you calculate the efficiency?
Efficiency = (Useful Work / Total Work) × 100%
What is the formula for efficiency?
Efficiency = (Output / Input) × 100%
How do you calculate the time taken to complete a job?
Time = Total Work / Rate
What is the formula for the work done by multiple people?
Work = (Individual Rate × Individual Time) + (Individual Rate × Individual Time) + …
What is the formula for the time taken by multiple people to complete a job?
Time = Total Work / (Individual Rate + Individual Rate + …)
What is the formula for finding the number of workers required to complete a job in a given time?
Number of Workers = Total Work / (Individual Rate × Time)
How do you calculate the efficiency of multiple workers?
Efficiency = (Total Output / Total Input) × 100%
What is the formula for efficiency when different workers have different efficiencies?
Efficiency = (Total Output / (Individual Efficiency × Total Input)) × 100%
What is the formula for finding the work done when two people work together?
Work = (Individual Rate × Individual Time) + (Individual Rate × Individual Time)
What is the formula for finding the time taken when two people work together?
Time = Total Work / (Individual Rate + Individual Rate)
What is the formula for finding the work done when two people work alternatively?
Work = (Individual Rate × Individual Time) - (Individual Rate × Individual Time)
What is the formula for finding the time taken when two people work alternatively?
Time = Total Work / (Individual Rate - Individual Rate)
What is the formula for finding the total work when people work in shifts?
Total Work = (Individual Work × Individual Time) + (Individual Work × Individual Time) + …
What is the formula for finding the total time taken when people work in shifts?
Total Time = Individual Time + Individual Time + …
How do you calculate the efficiency when people work in shifts?
Efficiency = (Total Output / (Individual Work × Total Time)) × 100%
What is the formula for finding the time taken when people work in parallel?
Time = 1 / (1/Time1 + 1/Time2 + …)
How do you calculate the number of days required to complete a work?
Days required to complete work = 1 / Work done in 1 day
What is the relationship between efficiency and time taken?
Efficiency is inversely proportional to the time taken. (Efficiency α 1 / Time taken)
What is the formula to compare the work done by different groups of people?
M1 * D1 * T1 * E1 / W1 = M2 * D2 * T2 * E2 / W2
In the formula for comparing work done by different groups, what do M1, D1, T1, E1, W1 represent?
M1 represents the number of persons, D1 represents the number of days, T1 represents the number of hours each day, E1 represents the efficiency, and W1 represents the work done by the first group.
In the formula for comparing work done by different groups, what do M2, D2, T2, E2, W2 represent?
M2 represents the number of persons, D2 represents the number of days, T2 represents the number of hours each day, E2 represents the efficiency, and W2 represents the work done by the second group.
