A lift having a simple pendulum attached with its ceiling is moving upward with constant acceleration 'a'. What will be the tension in the string of pendulum with respect to a boy inside the lift and a boy stansing on earth, mass of bob of simple pendulum is m.

Explanation

To solve the problem of finding the tension in the string of a simple pendulum attached to the ceiling of a lift moving upward with constant acceleration 'a', we will analyze the situation from the perspectives of both a boy inside the lift and a boy standing on the ground.

### Step-by-Step Solution:

**Step 1: Analyze the situation from the perspective of the boy inside the lift.**

- The boy inside the lift is in a non-inertial frame of reference because the lift is accelerating upwards.
- In this frame, the pendulum bob appears to be at rest.
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