weight of the box is given as
here this is placed on the inclined of angle 42 degree
now this weight will have two components one is along the incline other is perpendicular to it
so here we need to apply a force parallel to incline opposite to its component of weight
so here the component of weight is given as
here we have
so it requires 75 n force to move it upwards
a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.
d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.