Abox is sitting stationary on a ramp that is 42° to the horizontal. the box has a gravitational force of 112.1 n.
what is the minimum amount of force that can be applied to the box to get the box to move?

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Could someone me find the answer to this problem.