u Cilalll! if a 50-kg block is attached l0 le from a ledge. The density of the rope is 55 g/m. How ms eely is needed to pull the entire rope to the ledge? iS 32. Coiling a rope A 60-m-long, 9.4-mm-diameter rope hangs 33. Winding part of a chain A 20-m-long, 50-kg chain hangs verti- ally from a cylinder attached to a winch. How much work is needed to wind the upper half of the chain onto the winch? 34. Leaky Bucket A 1-kg bucket resting on the ground contains 3 kg of water. How much work is required to raise the bucket vertically a distance of 10 m if water leaks out of the bucket at a constant rate of j kg/m? Assume the weight of the rope used to raise the bucket is negligible. (Hint: Use the definition of work W SF() dy, where F is the variable force required to lift a object along a vertical line from y a to y b 35. Emptying a swimming pool A swim box with a base that mennu ming noal

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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.