Rosie lifts a trunk weighing 470 N up 1.3 m. If it takes her 12 s to lift the trunk, at what average rate does she do work?
To find the average rate at which Rosie does work, we need to calculate the work done by Rosie and divide it by the time taken.
The formula for work is given by:
Work = Force × Distance
Given:
Force (F) = 470 N
Distance (d) = 1.3 m
Time (t) = 12 s
First, let's calculate the work done by Rosie:
Work = Force × Distance
Work = 470 N × 1.3 m
Work = 611 N·m (Joules)
Now, we need to calculate the average rate at which Rosie does work:
Average Rate of Work = Work / Time
Average Rate of Work = 611 N·m / 12 s
Dividing these values will give us the average rate at which Rosie does work.