1. a body has weight of 500N on the surface of the earth . what at wiil be it's mass an weight an another planet Where the acceleration on due to gravity is one-fifth of that of the earth ?(take g=10m/s`2)​

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?