Question

An elevator car has a mass of 1600 kg and is carrying passengers having a combined...

An elevator car has a mass of 1600 kg and is carrying passengers having a combined mass of 300 kg. A constant friction force of 4000 N retards its motion.

How much power must a motor deliver to lift the elevator car and its passengers at a constant speed of 3.00 m/s _____.

a. 4.39e4 W

b. 6.79 e4 W

c. 5.02e4 W

d. 2.62e4 W

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Concept - use Newton’s law of motion to find the tension in the cable of elevator. Since speed is constant, acceleration will be zero. Use the tension and the speed to find the required power as shown below

***************************************************************************************************
This concludes the answers. If there is any mistake or omission, let me know immediately and I will fix it....

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
An elevator has a mass of 2,000 kg and is carrying a load of passengers with...
An elevator has a mass of 2,000 kg and is carrying a load of passengers with a combined mass of 250 kg. A constant friction force of 3,000 N retards the motion of the elevator. recall; P = dW/dt a) How much power must the motor provide to lift the car at a constant speed of 4 m/s? b) How much power is required to provide the elevator car with 9.8 m/s^2 of acceleration at 1 m/s vs 4 m/s?
An elevator car has a mass of 1500 kg carry 3 passengers with a total mass...
An elevator car has a mass of 1500 kg carry 3 passengers with a total mass of 330 kg. The lift operates with a constant frictional force of 2 700 N working against the motion of the elevator. How much power must the motor deliver to the elevator cart to keep it moving at a constant speed of 2.4 ms-1 ? How much power would need to be supplied by the motor if it was 70% efficient?
An elevator car including the passengers has a mass of 1100 kg and travels downwards at...
An elevator car including the passengers has a mass of 1100 kg and travels downwards at constant speed of 4.000 m/s for 32.00 m. The force of friction averaging 80.00 N acts on the elevator. The work done by the force of gravity; the work done by the force of friction; and the work done by the cable supporting the elevator during the 32.00 m excursion were (in that order, in kJ): Answer: 345.0; -2.560; -342.4
A car and its passengers have a total mass of 1,800 kg. The car is supported...
A car and its passengers have a total mass of 1,800 kg. The car is supported by four springs, each having a constant of 20,000 N/m. What is the frequency of vibration when the car hits a bump in the road? Frequency = ___Hertz
An elevator filled with passengers has a mass of 1583 kg. (a) The elevator accelerates upward...
An elevator filled with passengers has a mass of 1583 kg. (a) The elevator accelerates upward from rest at a rate of 1.20 m/s2 for 2.00 s. Calculate the tension in the cable (in N) supporting the elevator. (b)The elevator continues upward at constant velocity for 9.22 s. What is the tension in the cable (in N) during this time? (c)The elevator decelerates at a rate of 0.600 m/s2 for 4.00 s. What is the tension in the cable (in...
Six passengers with combined mass 375 kg compress the springs of a truck with worn-out shock...
Six passengers with combined mass 375 kg compress the springs of a truck with worn-out shock absorbers by 6.00 cm when they get in. Model the truck and passengers as a single body on a single ideal spring. The loaded truck has a frequency of vibration of 0.3 Hz. 1. Find the ideal spring constant ?. 2. Find the mass of the truck. 3. What is the period of vibration of the empty car?
(8c7p44) The loaded cab of an elevator has a mass of 4000 kg and moves 207...
(8c7p44) The loaded cab of an elevator has a mass of 4000 kg and moves 207 m up the shaft in 31 s at constant speed. At what average rate does the force from the cable do work on the cab?
A 1860 kg car experiences a combined force of air resistance and friction that has the...
A 1860 kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down hill at 38.9 m/s. Going up hill, the car's engine needs to produce 66.4 hp more power to sustain the constant velocity than it does going down the same hill. At what angle is the hill inclined above the horizontal?
(a) An elevator of mass m moving upward has two forces acting on it: the upward...
(a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? (b) When the elevator is moving at a constant velocity upward, which is greater, T or w? (c) When the elevator is moving upward, but the acceleration is downward, which is greater, T or w? (d) Let the elevator...
A 1900-kg car experiences a combined force of air resistance and friction that has the same...
A 1900-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 27 m/s. Going up a hill, the car’s engine produces 35.10 kW more power to sustain the constant velocity than it does going down the same hill. Calculate at what angle the hill is inclined above the horizontal.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT