How much electric force is there between a charged object and a neutral object 1. none
2. a little since the neutral object becomes charged by induction
3. there is small force, but only if the two objects are touching one another
4. there is a large force because of coulombs law
please help me out

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?