A bucket begins weighing 15 pounds, including the sand it holds. The bucket is to be lifted to the top of a 20 foot tall building by a rope of negligible weight. However, the bucket has a hole in it, and leaks 0.3 pounds of sand each foot it is lifted. Find the work done lifting the bucket to the top of the building. foot-pounds
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Given,
Weight of bucket including sand = 15 pounds
Bucket leaks at the rate = 0.3 pounds/foot
Height of building = 20 foot
We need to find out the work done in lifting the bucket to the top of the building.
If an object moves in a straight line by a continuous force F(x), then the workdone by the force is given as:
W = ∫ F(x) dx
with lower limit = a and upper limit = b
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