Select T-True, F-False, for each statement. If the first is T and the rest F, en
ID: 1601028 • Letter: S
Question
Select T-True, F-False, for each statement. If the first is T and the rest F, enter TFFFFF. A) The work done to raise a box onto a platform depends on how much time it takes to raise it. (Neglect friction, assume it starts on the ground at rest, and ends up resting on the platform) B) The kinetic energy of a moving object is always positive. C) The kinetic energy of an object is independent of the direction of the motion involved. D) Work cannot be done in the absence of motion. E) The work done by a constant force acting on an object depends on the orientation of the force relative to the motion of the object F) The work-energy principle is not valid if there are frictional forces acting.
Explanation / Answer
A)F depends on displacement of the body
B)T square of the velocity is always positive
c)F no
D)T work is said to be done if there is adisplacement for the body
E)T w=f.s costheta
F)F work energy theorem can be applied even if there are nonconservative forces