Aledge on a building is 18 m above the ground. a taut rope attached to a 4.0-kg can of paint sitting on the ledge passes up over a pulley and straight down to a 3.0-kg can of nails on the ground. if the can of paint is accidently knocked off the ledge, what time interval does a carpenter have to catch the can before it smashes on the floor?

t=5.07 s

Explanation:

Given

height of Building h=18 m

mass of Paint can

mass of second can

let T be the Tension in the rope

For  4 kg can

----1

For 3 kg can

----2

From 1 and 2

So time taken to cover 18 m is

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