An elevator starts from rest at the ground floor and accelerates upward at 1.2 m/s²…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An elevator starts from rest at the ground floor and accelerates upward at 1.2 m/s² for 3.0 s, then travels at constant speed, and finally decelerates at –0.90 m/s² for 4.0 s to come to rest at the top floor. The total displacement between floors is 30 m. Determine the time the elevator spends moving at constant speed.