Asquare metal plate 1.5m side and 1.2mm thick weighting 50n is to be lifted through a vertical gap at 25mm of infinite extent . the oil in air gap has a specific gravity of 95 percent and viscosity of 2.5n. s/m^2. if the metal plate is to be lifted at a constant speed of 0.1m/s find the force and power required.

Viscous force on the plate is given by

Buoyancy force on the plate is given as

Weight of the plate = 50 N

Now for constant speed of plate the net force on it must be zero

SO here we can say

So it will require a constant force of 493.6 N

explanation:

areas w steep slopes, west coast, rocky mountains, and appalachian mountains

it is called kinetic energy