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Question: You & your friend peter are putting new shingles on a roof pitched at 25 degrees. You are sitting on the very top of the roof when peter, who is at the edge of the roof directly below you, 5.1m away, asks you for the box of nails. Rather than carry the 2.5 kg box of nails down to peter, you decide to give the box a push & have it slide down to him.If the coefficient of kinetic friction between the box & the roof is 0.55, with what speed should you push the box to have it gently come to rest right at the edge of the roof?
The spring is kept from pushing them apart, since they are holding each other. When they release their arms, Al moves off in one direction at a speed of 1.16m/s, while Jo moves off in the opposite direction at a speed of 0.973m/s. Assume that frictio..
In the 1950s, an experimental train that had a mass of 2.30 x 10^4 kg was powered across a level track by a jet engine that produced the thrust of 5.30 x 10^5 N for a distance of 504 m. unless otherwise directed, suppose that air resistance is neglig..
The potential at location A is 393 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 781 V, and when released from rest from this spot, the particle arrives at B wit..
For the Atwood's machine, suppose the masses have an initial speed of v = 0.22 m/s and that m2 is moving upward. How high does m2 rise above its initial position before momentarily coming to rest, given that m1 = 3.5 kg and m2 = 3.1 kg.
What is a stopping distance
What is a density of the block
Find out the electric field at radius
A town is installing a new 10” main to carry drinking water. The only section remaining to be installed is a segment through the middle of town. Calculate the length of pipe required for the pipe system.
What is the pressure inside the thermos
A 50-kilogram woman balances on one heel of a pair of high heel shoes. If the heel is circular with radius of .5 cm, what pressure does she exert on the floor.
A 1035 kg car carrying four 78 kg people travels over a rough "washboard" dirt road with corrugations 5.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude while its speed is 16 km/h. The car now ..
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
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