A 100 g arrow is fired from a bow whose string exerts an average force of 100 N on the arrow over a distance of 100 cm. What is the speed of the arrow as it leaves the bow I already answered this question but I want see if I’m right before I’m submit my answer thanks

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?