Match their wavelengths

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?