A spacecraft is traveling in space far from any planets or stars. How much force is required to maintain the spacecraft's speed?

1/2 the mass of the spacecraft

1/4 the mass of the spacecraft

none

twice the mass of the spacecraft

I feel like its none, since there are no planets or stars to exert force on the rocket but I'd like to be sure.

Question

A spacecraft is traveling in space far from any planets or stars. How much force is required to maintain the spacecraft's speed? 


1/2 the mass of the spacecraft

1/4 the mass of the spacecraft

none

twice the mass of the spacecraft

I feel like its none, since there are no planets or stars to exert force on the rocket but I'd like to be sure.

anonymous · Answer

because there is no friction, or very negligible friction, you would assume that the amount of force required to keep the ship at its constant speed is none.