elevator
Homework Answers
An elevator is able to raise 1,000 kg to a height of 36 m in 12...
An elevator is able to raise 1,000 kg to a height of 36 m in 12 s. (a) How much work does the elevator do? (b) What is the elevator's power output?
A service elevator lifts 300 kg of cargo up to 10 stories (40m). The electric motor...
A service elevator lifts 300 kg of cargo up to 10 stories (40m). The electric motor that supplies the mechanical energy for the lift uses 3000 kilojoules of electrical energy when performing this task within 20 seconds. How much potential energy does the elevator's cargo have at the end of this short ride (J)? How much work (change in mechanical energy) does this elevator system output by doing this task (J)? What is the energy % efficiency of the system?...
A 900 kg elevator accelerates upward at 1.3 m/s2 for 11 m, starting from rest.
A 900 kg elevator accelerates upward at 1.3 m/s2 for 11 m, starting from rest. You may need to review (Page 206) Part A How much work does gravity do on the elevator?Part B How much work does the tension in the elevator cable do on the elevator? Part C What is the elevator's kinetic energy after traveling 11 m?
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at...
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s^2. What is the magnitude of the normal force of the elevator floor on the dog? An astronaut's weight on earth is 80 N. What is his weight on Mars where g = 3.76 m/s^2? (a) How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m? (b) How much power does the motor supply...
A 68-kg man stands on a spring scale in an elevator. Starting from rest, the elevator...
A 68-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.77 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest. (a) What does the spring scale register before the elevator starts to move? N (b) What does the spring scale register during the first 0.77 s of the elevator's ascent?...
Please let it be legible, thanks in advance! Part A How much work does an elevator...
Please let it be legible, thanks in advance!
Part A How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m ? Express your answer with the appropriate units. Wext = 9.8x105 J Submit Previous Answers Correct Part B 31 IC C W X P Correct Part B How much power must the motor supply to do this in 43 s at constant speed? Express your answer with the appropriate units. μΑ...
A 500 kg elevator accelerates upward at 2 m/s2 for 17 m, starting from rest. A)...
A 500 kg elevator accelerates upward at 2 m/s2 for 17 m, starting from rest. A) How much work does gravity do on the elevator? B) How much work does the tension in the elevator cable do on the elevator? C) What is the elevator’s kinetic energy after traveling 17 m?
(a) Find the useful power output (in W) of an elevator motor that lifts a 2800...
(a) Find the useful power output (in W) of an elevator motor that lifts a 2800 kg load a height of 35.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10,000 kg-so that only 2800 kg is raised in height, but the full 10,000 kg is accelerated. (b) What does it cost (in cents), if electricity is $0.0900 per kw-h? cents Additional Materials...
cable lifting an elevator
The cable lifting an elevator is wrapped around a 1.1-mm-diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 2.3 m/sm/s . It then slows to a stop, while the cylinder turns one complete revolution.How long does it take for the elevator to stop?
2. Two blocks are stacked in an elevator as shown. The elevator is moving down at...
2. Two blocks are stacked in an elevator as shown. The elevator is moving down at 3.0 and speeding up. The magnitude of the elevator's accelerauon is 2.5 17 s2 a) What is the direction of the acceleration? Explain your answer using words or a vector drawing b) What is the normal force on the bottom block? c) What force does the top block exert on the bottom block? 30 kg
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s^2. What is the magnitude of the normal force of the elevator floor on the dog? An astronaut's weight on earth is 80 N. What is his weight on Mars where g = 3.76 m/s^2? (a) How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m? (b) How much power does the motor supply...
Please let it be legible, thanks in advance!
Part A How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m ? Express your answer with the appropriate units. Wext = 9.8x105 J Submit Previous Answers Correct Part B 31 IC C W X P Correct Part B How much power must the motor supply to do this in 43 s at constant speed? Express your answer with the appropriate units. μΑ...
(a) Find the useful power output (in W) of an elevator motor that lifts a 2800 kg load a height of 35.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10,000 kg-so that only 2800 kg is raised in height, but the full 10,000 kg is accelerated. (b) What does it cost (in cents), if electricity is $0.0900 per kw-h? cents Additional Materials...
2. Two blocks are stacked in an elevator as shown. The elevator is moving down at 3.0 and speeding up. The magnitude of the elevator's accelerauon is 2.5 17 s2 a) What is the direction of the acceleration? Explain your answer using words or a vector drawing b) What is the normal force on the bottom block? c) What force does the top block exert on the bottom block? 30 kg
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