while rowing in a race, john uses his arms to exert a force of 165 N per stroke while pulling the .80 m. how much work does he do in 30 stroke?
A mechanic uses a hydraulic lift to raise a 1200kg car 0.5m off the ground how much work does the lift do on the car?
To calculate the work done by John in 30 strokes, we need to know the distance he covers with each stroke and the total number of strokes he performs.
Given:
Force per stroke (F) = 165 N
Distance per stroke (d) = 0.80 m
Number of strokes (n) = 30
We can determine the work done (W) using the formula:
W = F × d
Substituting the given values:
W = 165 N × 0.80 m
W = 132 N*m
Now, to calculate the total work done in 30 strokes:
Total work (W_total) = W × n
Substituting the values:
W_total = 132 N*m × 30
W_total = 3960 N*m
Therefore, John does 3960 N*m of work in 30 strokes.
To find the work done by John in 30 strokes, we first need to calculate the work done per stroke and then multiply it by the number of strokes.
Work is calculated using the formula:
Work = Force x Distance
In this case, the force exerted by John per stroke is 165 N, and the distance is 0.80 m. So, the work done per stroke is:
Work per stroke = 165 N x 0.80 m
Work per stroke = 132 J
To find the total work done in 30 strokes, we multiply the work per stroke by the number of strokes:
Total work = Work per stroke x Number of strokes
Total work = 132 J x 30 strokes
Total work = 3960 J
Therefore, John does 3960 Joules of work in 30 strokes.