What would happen if there were no soundboxes (resonances) in musical instruments?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

What happens during the fall in september

A10.0 kg crate is pushed with a horizontal force of 40 n. the crate moves at a constant velocity of 3.0 m/s. what is the value of the friction force on the crate? 10 n 100 n 40 n 70 n