Range of an instrument is _____
a) The minimum value that can be measured
b) The maximum value that can be measured
c) All values starting from the minimum to the maximum that can be measured
d) The average of all values that can be measured

Explanation

Forces on the block are
its weight Mg
ii the normal force N
the applied force F and
the kinetic friction `muN`.

The forces are shown in filgure. As the block moves with a uniform velocity, the forces and up to zero.
Taking horizontal and vertical components.
`F costheta=mu(Mg-Fsintheta)`
`F=(muMg)/(costheta+musintheta)`
the work done by this force during a displacement d is
`W=Fd costheta=(muMgdcostheta)/(costheta+musintheta)`