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Q. A 2.97 kg block is pushed 1.45 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of 56.6 degrees with the horizontal. The acceleration of gravity is 9.8 m/s2. If the coefficient of kinetic friction between. the block and wall is 0.623, find the work done by F.
Q. A house has a floor area of 115 m2 and an outside wall that has an area of 24 m2. The earth's magnetic field here has a horizontal component of 2.50 e 10-5 T that points due north and a vertical component of 4.30 e 10-5 T that points straight down, toward the earth.
(a) Determine the magnetic flux through the wall if the wall faces north.
(b) Determine the magnetic flux through the wall if the wall faces east.
(c) Calculate the magnetic flux that passes through the floor.
A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame.
Two boxes A and B are connected to each end of a light vertical rope. A constant upward force 80.0 is applied to box. Starting from rest, box descends 10.4 in 3.40. The tension in the rope connecting the two boxes is 37.0
How much time is spent in pushing the mower
Now the gymnast (not holding any additional mass) walks directly above right support. What is the force the left support exerts on beam.
What is velocity of the boat relative to the shore
A tank with vertical walls, 2m wide and 2m long and 2.5 m high, is filled with 4800 litres of water (density 1000 kg/m3) and 3200 litres of light oil (density 900 kg/m3). compute the magnitude and location of the resultant force on each of the ver..
An object is found to have a weight in air of 500N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. at last the object is immersed in oil and is found to have a ..
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
An automobile club plans to race a 780 kg car at the local racetrack. The car needs to be able to travel around several 170 m radius curves at 85 km/h. What must the banking angle of the curves be so that the force of the pavement on the tires of the..
A loudspeaker of mass 25 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.30.
What would be the equilibrium temperature when a 256 g block of copper at 314 °C is placed in a 140 g aluminium calorimeter cup containing 827 g of water at 11.5 °C.
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