A man of mass 70kg stands on a weighing scale in a lift which is moving:

Options

A. upwards with a uniform speed of `ms^(-1)`
B. downwards with a uniform acceleration of `5ms^(-2)`
C. upwards with a uniform acceleration of `ms^(-2)`. What would be the readings on the scale in each case?
D. What would be the reading if the lift mechanism falled and it hurted down freely under gravity?

Explanation

To solve the problem of a man standing on a weighing scale in a lift that is moving in different scenarios, we will analyze each case step by step.

### Given:
- Mass of the man (m) = 70 kg
- Acceleration due to gravity (g) = 10 m/s²

### Case 1: Lift moving upward with a uniform speed of 10 m/s
1. **Understanding Forces**: When the lift moves at a constant speed, the acceleration is zero. The only forces acting on the man are his weight (downward) and the normal force (upward) exerted by the weighing scale.
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