A 63 kg astronaut is drifting in space at a velocity of 7.0 m/s to the right with respect to the spacecraft. The astronaut uses the jetpack to move to the left and back to the spacecraft. The jetpack fires for 14.0 seconds and the astronaut makes it back to the ship. What was the force exerted by the jetpack? AND for extra credit, how far away from the ship where they?

J = Δp = m Δv = F Δt
Impulse = change in momentum = mass x change in velocity = force x time interval