Test SeriesFree PYQsExamsPricing

JEE Main Physics question

PhysicsLaws of MotionJEE Main

A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of 45° with the initial vertical direction is [AIEEE 2006]

Answer: (C)

Solution

Using the work-energy theorem for the horizontal force F doing work F·l sinθ (where l is the string length) as the bob rises by l(1−cosθ):

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-154079