question # 1 :Estimate the work you do to mow a lawn 13m by 23m with a 60cm wide mower. Assume you push with a force of about 15 N .
nvm got the answer
To estimate the work you do to mow a lawn, you need to calculate the total distance traveled while mowing and multiply it by the force applied. Here's how you can do it:
1. Calculate the perimeter of the lawn:
Perimeter = 2(length + width)
Perimeter = 2(13m + 23m)
Perimeter = 2(36m)
Perimeter = 72m
2. Convert the width of the mower to meters:
Width = 60cm = 0.6m
3. Calculate the number of back-and-forth cycles required to cover the entire lawn:
Number of cycles = perimeter / width
Number of cycles = 72m / 0.6m
Number of cycles = 120
4. Calculate the distance traveled in one cycle:
Distance traveled = width x number of cycles
Distance traveled = 0.6m x 120
Distance traveled = 72m
5. Calculate the work done:
Work = force x distance traveled
Work = 15N x 72m
Work = 1080J (Joules)
Therefore, the estimated work you would do to mow a lawn measuring 13m by 23m with a 60cm wide mower, while applying a force of 15N, is approximately 1080 Joules.