If a person weighs 717 n on earth and 5320 n on the surface of a nearby planet, what is the acceleration due to gravity on that planet?

The acceleration due to gravity on that planet = 72.76

Explanation:

  Weight of person in earth = 717 N

  We know that weight = mg

   Acceleration due to gravity of earth =

   So mass of person = 717/9.8 = 73.16 kg

   Mass of body is constant everywhere, so mass of person on the surface of a nearby planet = 73.16 kg

   Weight on the surface of a nearby planet = 5320 N = mg', where g' is the acceleration due to gravity value of the nearby planet.

     So   5320 = 73.16*g'

                   g' = 72.76

   The acceleration due to gravity on that planet = 72.76

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

see earlier answer