Recent content by shizupple

Homework Statement In the traveling bridge crane shown all crossed members are slender tie rods incapable of supporting compression. Determine the forces in members DF and EF and find the horizontal reaction on the truss at A. Show that if CF=0, DE=0 also. -Determine force in members...

anyone know what I'm doing wrong here?

1. The problem statement, all variables and given/known data A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 190.0 N at an angle of 28° with the horizontal. The box has a mass of 37 kg, and the...

Ok so your saying the horizontal speed just causes displacement but won't effect the total time to get across the river. You basically disregard the speed of the river. I did the displacement divided by the speed of the hunters boat and got the right answer. I guess its kind of like thinking...

Homework Statement A hunter wishes to cross a river that is 1.6 km wide and that flows with a speed of 3.4 km/h. The hunter uses a small powerboat that moves at a maximum speed of 12.4 km/h with respect to the water. What is the minimum time necessary for crossing? Homework Equations...

Awesome thanks!

Homework Statement A shell is fired from the ground with an initial speed of 1670m/s at an initial angle of 51° to the horizontal (a) Neglecting air resistance, find the shell's horizontal range. (b) Find the amount of time the shell is in motion. Homework Equations dx=vi+.5at^2...

Nevermind I got it they wanted the angle from the other side (76.3). Thanks!

My webassign is marking it wrong... i don't see how it is wrong though??!

Homework Statement Kyle is flying a plane due north at 230 km/h as a wind carries it due east at 56 km/h. Find the magnitude and direction of the plane's resultant velocity analytically. 236.7 km/h (magnitude) ° (direction) Homework Equations Tan=opp/adj The Attempt at a...

Thats a good explanation. I didnt know you had to figure in the time to the initial velocity like that. Thanks for your help Anden! I got the answer (31.5195) on my last guess!

Hmm I'm kind of confused on this. Yes there is initial velocity but you don't know how long there is initial velocity. It just says the car accelerated then broke. Which to me means it instantly broke so when you do the first part of the equation you would be multiplying (7.7)(0) which would be...

I actually tried this too. I did: .5(1.4)(5.5)^2=21.175 .5(-1.9)(1.7)^2=-2.7455 I added them together without the - sign to get 23.9205... wasnt correct. So i tried subtracting the -2.7455 to get 18.4295 (which is not even logical) and wasnt correct. :confused:

Homework Statement A car starts from rest and travels for 5.5 s with a uniform acceleration of +1.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.9 m/s2. The breaks are applied for 1.70 s. (a) How fast is the car going at the end of the braking period? 4.47...

Set up an equation with respect to the flagpole being zero. If runner a is 4mi west (-4miles) and running 6mi/h east (+6mi/h) and runner b is 3 miles east (+3miles) running at 5mi/h west (-5mi/hr), then you can set them equal to each other to find when they meet. -4+6x=3-5x then x=.64 Then...