Recent content by Mike667

Haha, yeah ill change it.

oh really?:rolleyes: actually, its -1.9 m/s because the astronaut goes backwards.

Is the answer 1.9 m/s?

Yes, that's what i was thinking. thanks again.

Homework Statement A 63 kg astronaut at rest in space throws a 10 kg oxygen tank with a speed of 12 m/s. What is the velocity of the astronaut immediately after throwing the tank? Which formula would I use to solve this? Thanks in advance.

alright, thanks a lot man.

X is 9, B is 1?

Wait wait wait, so you're saying the answer is 1/9, not 9b? I definitely see where you're coming from, its just that I supposed the answer would look different.

Ummm can you show that, please?

Why isn't b an x in the first case then? f*b = 1/2(m)(20)^2 f*b = 200m? f*x= 1/2(m)(60)^2 f*x= 1800m?Then what? how can i get the answer to just be 9b?

Ok, so f*b = 1/2(m)(20)^2 f*b = 200m? f*b= 1/2(m)(60)^2 f*b= 1800m? I feel like I am missing something here.

g is 10 right? but what does mu stand for?

ΔKE is 1/2(m)(v)^2 right? I have no idea what you mean by an equation that relates frictional force with distance. f*d, perhaps? Where would i put the b in the formula?

Homework Statement A car with an initial speed of 20 m/s brakes to a complete stop after traveling distance b from the moment the brakes are applied. What would be the minimum braking distance if the initial speed was 60 m/s? Homework Equations W= ΔKE The Attempt at a Solution I...