Answer Happy

On a trip to Kuala Lumpur, Malaysia, you visit the Petronas TwinTowers (the world’s tallest building from 1998 to 2004). In anelevator on the way to the top, you wonder what the maximumacceleration of the elevator is during normal operation. However,when you ask about it at the building’s information desk, thepeople there don’t seem to understand what you’re asking. As aphysics student, you realize that you can find out for yourself.You rush back to your hotel, borrow the bathroom scale in yourroom, and return to the elevators in the Petronas Towers. Whilestanding on the scale inside the elevator when it isn’t moving, yousee that the scale shows a steady reading of 68 kg. You keepstanding on the scale as the elevator ascends to the top of thebuilding and note that the highest value the scale reads is 91 kg.Based on these readings, determine the elevator’s acceleration.