Question

What is the period of this pendulum if the elevator accelerates upward with an acceleration a?

Answer 1

When the elevator accelerates upwards with an acceleration, apparently the period which would decrease the period. However, since the upwards acceleration is in the opposite direction as the gravitational acceleration, why do we add a and g instead of subtracting a from g? Thanks 






I hope that it will help you

Answer 2

Answer:

When the elevator accelerates upwards with an acceleration, apparently the period becomes T = 2π √lg+a, which would decrease the period.