Recent content by Ally385

Awesome! Thanks :)

So is it in cm/s now because that's what it says in the problem? And then do I have to change it to minutes because that's what it asks for next to the answer blank. (Sorry forgot to put that in.)

So that would make it: F Δt = Δ p So that makes that Δt = Δp/ F Δt = 4732200 - 0 / 35 Δt = 135205.7 But now how do I get rid of the delta?

Homework Statement Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. If it is fired to change the velocity of a 71700 kg spacecraft by 66 cm/s, how long should it be fired? Homework Equations p = mv Impulse = FΔt...

So that would be 2 right? It said that's the wrong answer. Should I not have multiplied the height as 2?

Homework Statement A 0.155-kg ball, moving in the positive direction at 13 m/s, is acted on by the impulse shown in the graph below. What is the ball's speed at 4.0 s? The graph is attached below. Homework Equations J = F Δt The Attempt at a Solution I thought that it might...

Maybe I was just measuring wrong. And the 45 makes since. I was doing 315-180. Thanks!

Homework Statement A hiker's trip consists of three segments. Path A is 6.0 km long heading 60.0° north of east. Path B is 6.0 km long in a direction due east. Path C is 4.0 km long heading 315° counterclockwise from east. (a) Graphically add the hiker's displacements in the order A, B, C...

Ok so acceleration would be 9.29 m/s/s and then for the second part it would be -4.70! I get it thank you :D

Ok so that would get you 828 N/ 9.8 m/s/s = 84.4898. Is that in kg? So that's the mass of the person so then do 919 N / 84.4898 = 10.88 which is your acceleration? And then for the last part it would be 728/84.4898 = -8.62 the negative because it's slowing down. Negative acceleration. Correct?

I know that the scale is exerting a force but I'm not sure how much. Also, would the elevator be exerting a force? I also know that gravity is a force but I think that's it.

Homework Statement When adding 2 vectors together graphically, which of the following may be done? A) moving a vector B) rotating a vector C) changing the length of a vector D) changing the angle between the vectors Homework Equations a = ax +ay The Attempt at a Solution I...

Homework Statement A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 828 N. (a) As the elevator moves up, the scale reading increases to 919 N. Find the acceleration of the elevator. (b) As the elevator approaches the 74th floor, the...

Homework Statement We did a lab in class where we had a cart and we had nothing on top of it. We added different forces at the end of a pulley to see how the acceleration differed with different forces. One of the questions on our lab was: We tried to keep the "mass constant". Why is this...

That helped. Thanks!