So a crane was tested by lifting a 2.232 x 10^6 kg.How do i find the magnitude of the force needed to lift the load with a net acceleration of 0 m/s^2BQ: if the same force applied to pull the load up a slope that makes a 30 degree angle with the horizontal, what would be the acceleration than.So the first problem i have an alright grip on what to do, But i am completely lost on the BQ,
I have put several roofs on housesYour roofing sales man is trying to make a sale and not necessarily being honest with you Tin roofs, painted or unpainted, heat up in the sun and pass that heat to the attic if there is no insulation on the roof sheetingI am talking about insulation between the rafters, not between the ceilings where it is normally atMost tin roofs have a gap at the ridge pole where the tin sheets from each side meetA Cap goes down the ridge pole to cover that gapSo yes there is a small natural ridge cap vent that could easily be enlarged to let the heat outTin roofs do not outlast regular composition roofs as claimed by tin roof salesmenIn fact, without replacing the screws or nails, they last half as longThe nail or screw that holds the roofing to the furrowing strip (strip of wood that runs across the rafters that supports the tin roof) causes a mild electric current that slowly eats away the roofing around it and creates a leak when the rubber washer on the screw dissintigrates from the sun and heatAs for the resale value? Personal choice of the perspective buyerI personally wouldn't buy a house with a tin roof unless it was in a snow zone where the tin would help the snow and ice slide off and relieve the weight.
now, you are lifting an object with 0 accn means you are basically exerting the same force as the weightSo in second ques, your force will be ma mg - mg sin30Therefore accn will be a g - g sin30, i.ea g/2 5 N/kg.
steel roof will fee approximately two times as much as shingles and if put in precise will look nicer and final longer! and you get a help in you homeowners coverageapproximately 10 % around right here (Texas) yet you couldT stroll on it, this is as slick as ice! Get a thicker gauge of steel 24 or 26 and it will final approximately 30 years!
