Author Question: A 50-N crate is pulled up a 5.0-m inclined plane by a worker at constant velocity. If the plane is ... (Read 312 times)

RYAN BANYAN · **on:** Jul 28, 2018

A 50-N crate is pulled up a 5.0-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37 to the horizontal and there exists a constant frictional force of 20 N between the crate and the surface, what is the force applied by the worker?
a. zero
c. 30 N
b. 50 N
d. 40 N

Question 2

If one could observe the individual atoms making up a piece of matter and note that during a process of change their motion somehow became more orderly, then one may assume which of the following in regard to the system?
a. increases in entropy
c. gains in thermal energy
b. decreases in entropy
d. positive work done on