An ideal spring obeys hooke’s law, f~ = −k~x. a mass of 0.50 kilogram hung vertically from this spring stretches the spring 0.075 meter. the acceleration of gravity is 10 m/s 2 . the value of the force constant k for the spring is most nearly

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. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.