Physics, 16.10.2019 16:20 igobeastmode
Consider a vertical elevator whose cabin has a total mass of 800 kg when fully loaded and 150 kg when empty. the weight of the elevator cabin is partially balanced by a 400-kg counterweight that is connected to the top of the cabin by cables that pass through a pulley located on top of the elevator well. neglecting the weight of the cables and assuming the guide rails and the pulleys to be frictionless, determine (a) the power required while the fully loaded cabin is rising at a constant speed of 1.2 m/s and (b) the power required while the empty cabin is descending at a constant speed of 1.2 m/s. what would your answer be to (a) if no counterweight were used? what would your answer be to (b) if a friction force of 800 n has developed between the cabin and the guide rails?
Answers: 3
Physics, 22.06.2019 13:00
Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?
Answers: 1
Physics, 22.06.2019 17:30
Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?
Answers: 1
Physics, 22.06.2019 19:00
If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?
Answers: 1
Physics, 22.06.2019 21:40
Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
Answers: 1
Consider a vertical elevator whose cabin has a total mass of 800 kg when fully loaded and 150 kg whe...
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Physics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
Mathematics, 18.10.2020 09:01
English, 18.10.2020 09:01