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A person stands on a weighing machine in a lift - Scottish Highers Physics - Question 4 - 2018
Question 4
A person stands on a weighing machine in a lift. When the lift is at rest, the reading on the weighing machine is 700N. The lift now descends and its speed increase... show full transcript
Worked Solution & Example Answer:A person stands on a weighing machine in a lift - Scottish Highers Physics - Question 4 - 2018
Step 1
B is a constant value lower than 700N
Answer
As the lift descends and accelerates downwards, the effective acceleration acting on the person inside the lift is decreased. This results in a lower reading on the weighing machine compared to when the lift was at rest.
The reading will be less than 700N because the person is experiencing less gravitational force due to the acceleration of the lift. Therefore, the correct answer is that the reading on the weighing machine is a constant value lower than 700N.