Verified Solution • 2025–26 Session moderate

QJEEM20Phfe3e: JEE Main 2020 Physics - Class 11 JEEM20Phfe3e Solution: An elevator in a building can carry a maximum of 10 persons,…

An elevator in a building can carry a maximum of 10 persons, with the average mass of each person being 68 kg, The mass of the elevator itself is 920 kg and it moves with a constant speed of 3 m/s. The frictional force opposing the motion is 6000 N. If the elevator is moving up with its full capacity, the power delivered by the motor to the elevator (g = 10 m/s2) must be at least :

Multiple Choice Options

  • A 48000 W
  • B 62360 W
  • C 56300 W
  • D 66000 W

Step-by-Step Verified Solution

Net force on motor will be

Fm = [920 + 68(10)]g + 6000 = 22000 N

So, required power for motor

P = Fm.V = 22000×3 = 66000 W

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring