Weight of Soldier with Machine Gun in Freefall

[sidt36]

Homework Statement

A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if he shoots 40 bullets a second at the speed of 500 m/s. If the weight of a bullet is 49 gm, what is the weight of the man with the gun ? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 m/s2

Homework Equations

acceleration in place of velocity?

The Attempt at a Solution

m_s* v = m_b*v But how do i get this velocity

 

[lordianed]

You could try to recall the relationship between force and momentum, that would explain how the soldier stays in the air.

 

[haruspex]

He fires one bullet; what is the effect on his velocity? If he does that 40 times a second, what acceleration would that produce?

 

[sidt36]

I think i have it

 

[SteamKing]

I think i have it

Yellow text on a white background is going to burn someone's eyes out.

 

[J Hann]

How did you get 49 in your solution since 49 gm / bullet = .049 kg / bullet?

 

[sidt36]

I multiplied it by 1/1000