Recent content by delfam

is it just (Vo^2) and not 2(Vo)^2

Homework Statement a 78g basketball is launched at 40.4 degrees at at 14.2m, ball is released at same height as basket. what speed must the player give the ball. Homework Equations deltax = 2(Vo^2)sin(2theta) The Attempt at a Solution 14.2 = 2Vo^2 * (.9871360) / 9.8 69.58 =...

because it's a car and it doesn't move on the y-axis. I'm still not sure how to get the angle though.

Homework Statement two forces, 406N at 17 degrees and 256N at -26 degrees are applied to a a 3400kg car. Find resultant of these two forces and the direction of the resultant force between -180 and 180 degrees. Homework Equations The Attempt at a Solution 406cos(17) = 388.26...

Homework Statement you and your friend throw balloons filled with water of a roof of a building. You drop yours from rest, he throws his with an initial speed of 72.52 m/s^2 3.7 seconds later. They hit at the same time. How high his the building. Homework Equations V=Vi+at (V^2) -...

typo, it was due north 43.2km not 432, the 143 degrees is when it says 53 degrees west of north, north is 90, so 90 + 53 = 143. I already got that part right, I just don't understand the wording on part b.

Homework Statement car travels 18.2km due north then 43.2km at 53 degrees west of north. Find magnitude of car's resultant displacement. b.) calculate the direction of the car's resultant displacement, measured counter-clockwise from the northerly direction.Homework Equations The Attempt at a...

-82.2, thanks for the help.

what, the 114.6, that was just a typo, I still don't understand the second part. "What is the direction of the resultant displacement? Use counterclockwise from due East as the positive angular direction, between the limits of −180◦ and +180◦. Answer in units of ◦." I just don't get the wording

Ax = 114.6cos(285) = 29.51 Bx = 112cos(247) = -43.76 Cx = 399cos(284) = 96.53 Dx = 29.51 = (-43.76) + 96.53 = 82.28 Ay = 114sin(285) = -110.12 By = 112sin(247) = -103.10 Cy = 399sin(284) = -387.15 Dy = -110.12 + (-103.10) + (-387.15) = -600.37 (82.28)^2 + (-600.37)^2 = 367214.14, square root...

Vector Help, Finding Angle Homework Statement Instructions for finding a buried treasure include the following: Go 114.6 paces at 285◦, turn to 247◦ and walk 112 paces, then travel 399 paces at 284◦. Find the magnitude of the resultant displacement from the starting point. Answer in units...

bump, I still have no clue how to even start this question. Do I need to set up two equations, one for the car and one for the cop, then set them equal, I'm just confused.

Homework Statement speeder passes a police car at 34 m/s. Police car from rest accelerates with a uniform acceleration of 2.2 m/s^2. How much time till the police car overtakes the speeder? Homework Equations V=Vi + at X=Xi +Vit + 1/2at^2 a= 2.2m/s^2 V=34m/s Vi=0 The Attempt at a...

thanks guys, yeah I got it, it was 1.398 km/s^2

4.7cm = .000007km and 8.2ms = .0082 seconds electron is from rest so Vi=0 so the equation is 2(X-Xi)/t^2, I have time and I have X which equals .000047km. How to I find Xi, or is that also zero?