"Constant velocity" means zero acceleration, which means zero net force. So there must be100N pulling on the crate to cancel the 100N of friction force.
There is not enough information to answer the question
As soon as I see "Which...", I know that the last part of the question is the list of answer choices, but you decided not to let us see them.
The answer is: A 33-Newton force pointing upward.
34. The element would have 34 protons. Also 34 electrons.
<span><span>P-waves are a type of body wave, called seismic
waves in seismology, that travel through a continuum and are the first waves from an earthquake to arrive at a seismograph.</span></span>
