Find the useful power output of an elevator motor that lifts a 2500-kg load a height...
Find the useful power output of an elevator motor that lifts a 2500-kg load a height of 35 m in 17 s, if it also increases the speed from rest to 4.25 m/s. Note that the total mass of the counterbalanced system is 10,000 kg--so that only 2500 kg is raised in height, but the full 10000 kg is accelerated.
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Find the useful power output of an elevator motor that lifts a
2500-kg load a height...
(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...
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?...
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power...
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this?
An elevator cab has a mass of 4510 kg and can carry a maximum load of...
An elevator cab has a mass of 4510 kg and can carry a maximum load of 1810 kg. If the cab is moving upward at full load at 3.90 m/s, what power is required of the force moving the cab to maintain that speed?
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate...
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate with a variable force, T, as defined by the figure below. Find: a) The speed of the crate when t = 2 seconds, starting from rest. Show your work. Include appropriate diagrams. m/s b) The power output of the motor at t - 2 seconds. Show your work. w c) If the efficiency of the motor is € = 0.6, which of t) a...
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate...
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate with a variable force, T, as defined by the figure below. Find: a) The speed of the crate when t = 2 seconds, starting from rest. Show your work. Include appropriate diagrams. m/s b) The power output of the motor at t - 2 seconds. Show your work. w c) If the efficiency of the motor is € = 0.6, which of t) a...
A 500 kg elevator starts from rest. It moves upward for 2.50 s with constant acceleration...
A 500 kg elevator starts from rest. It moves upward for 2.50 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. a.) What is the average power of the elevator motor during this period? b.) How does this power compare with the motor power when the elevator moves at its cruising speed?
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...
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 639-kg elevator starts from rest and moves upward for 3.40 s with constant acceleration until...
A 639-kg elevator starts from rest and moves upward for 3.40 s with constant acceleration until it reaches its cruising speed, 1.78 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upright trip with constant speed?
(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...
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate with a variable force, T, as defined by the figure below. Find: a) The speed of the crate when t = 2 seconds, starting from rest. Show your work. Include appropriate diagrams. m/s b) The power output of the motor at t - 2 seconds. Show your work. w c) If the efficiency of the motor is € = 0.6, which of t) a...
T(N) 1800 T = 2007 A 1 (8) 3 Given: The motor lifts the 20-kg crate with a variable force, T, as defined by the figure below. Find: a) The speed of the crate when t = 2 seconds, starting from rest. Show your work. Include appropriate diagrams. m/s b) The power output of the motor at t - 2 seconds. Show your work. w c) If the efficiency of the motor is € = 0.6, which of t) a...
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...
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