A 0.06-kg mass vibrates according to the equation x = 0.45cos6.40t, where x is in meter and t is in seconds. Determine (a) the amplitude, (b) the frequency, (c) the total energy, and (d) the kinetic energy and potential energies when x-0.30 m.

like poles repel so keep pushing north to north and repels funny to see this

a is the best answer your welcome

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