Consider two planets a and b. the mass of planet b is 0.012 times the mass of planet a and its radius is 0.3 times the radius of planet a. if the acceleration due to gravity at the planet a is 10 m/s2 , calculate the corresponding value at planet b.

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply