Log in
Physics
1
answer
0
watching
76
views

A 650 kg elevator starts from rest. It moves upward for 3s with constant acceleration until it reaches its cruising speed 1.75 m/s. 

What is the average power of the elevator during this period?

How does this power compare with the motor power when the elevator moves at cruising speed?

Watch
1
answer
0
watching
76
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Uttam Saikia
Uttam SaikiaLv10
21 Oct 2020

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A 72-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 0.80 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.5 s, and then comes to rest. What does the spring scale register:

(a) Before the elevator starts to move?

(b) During the first 0.80 s of the elevator’s ascent?

(c) While the elevator is traveling at a constant speed?

(d) During the elevator’s negative acceleration?

A 72-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 0.80 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.5 s, and then comes to rest. What does the spring scale register (a) before the elevator starts to move? (b) During the first 0.80 s of the elevator’s ascent? (c) While the elevator is traveling at constant speed? (d) During the elevator’s negative acceleration?

A 1000 kg elevator accelerates upward at 1.0 m/s2 for 10 m, starting from rest.

a) How much work does gravity do on the elevator?

b) How much work does tension in the elevator cable do on the elevator?

c) Use the work-kinetic energy theorem to find the kinetic energy of the elevator as it reaches 10 m.

d) What is the speed of the elevator as it reaches 10 m?

 

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in