A person of mass 65kg stands on a spring balance placed inside a lift.
(a) Calculate the reading of the balance when the lift is at rest.
(b) The lift now moves vertically upward with a constant speed of 2.0ms−1. What will the balance read?
(c) Next, the lift moves downward with a uniform acceleration of 1.5ms−2. Determine the balance reading.
(d) Finally, the lift is descending but comes to rest uniformly, experiencing an upward acceleration of 2.0ms−2. Find the balance reading during this retardation.