Is this correct?
Gabriella weighs 450 N. She climbs a flight of stairs to a height of 3 m. It takes her 5 seconds.
How much work does Gabriella do when she climbs the stairs?
Ans- 1,350 J.
What I did was 450*3
Can someone check this? Thanks
-MC
correct.
Thanks
-MC
No the work done is mgl I.e. u did not take gravity into consideration..so it is 450*9.8*3=44129.4 J
To calculate the work done by Gabriella when she climbs the stairs, you can use the formula: work (W) = force (F) x distance (d) x cos(theta), where force is measured in newtons (N), distance is measured in meters (m), and theta is the angle between the force and the displacement.
In this case, the force is Gabriella's weight, which is given as 450 N, the distance is 3 m, and there is no angle involved as the stairs are vertical, so we can assume theta to be 0.
Using the formula, we have: work (W) = 450 N x 3 m x cos(0) = 450 N x 3 m x 1 = 1,350 J.
So, your calculation of 450 N x 3 m is correct and the work done by Gabriella when she climbs the stairs is indeed 1,350 J.