Recent content by gadawg90

someone please help. this homework is due tonight and i don't know where to go from here

alright so the 1.78 cm needs to be changed to .0178 m. do i need to incorporate that equation somehow or is this a really simple problem?

The focal length of a relaxed human eye is approximately 1.78 cm. When we focus our eyes on a close-up object, we can change the refractive power of the eye by about 16 diopters. Calculate the focal length of the eye when we focus closely. 1/di+1/do=1/f im not really sure what to...

The actual frame size of "35-mm" film is 24 mm x 36 mm. You want to take a photograph of your friend, who is 1.70 m tall. Your camera has a 60.0 mm focal length lens. How far from the camera should your friend stand in order to produce a 36.0 mm-tall image on the film? i thought you would...

im still confused. when i find the distance what do i use as the second mass in the equation. and when i find F for all three spheres how do i find the gravitational force for the sphere at the origin?

alright well if i find r then what do i do next?

The masses and coordinates of three spheres are as follows: 16 kg, x = 0.75 m, y = 3.00 m; 34 kg, x = -2.50 m, y = -2.75 m; 60 kg, x = 0.00 m, y= -0.75 m. What is the magnitude of the gravitational force on a 30 kg sphere located at the origin due to the other spheres? Homework Equations i...

Alright so i set up the second equation like this 0=93.4^2 + 2(-9.8)d and for d i got 445.08 m

V = Vo + at X - Xo = Vot + .5at2 v2 = vo2 + 2a(X - Xo) X - Xo = .5(Vo + V)t

Starting from the constant-acceleration kinematic equations, write a formula that gives t in terms of xi, xf, vi, and vf. do i solve for acceleration in a equation and then plug it in? Starting from the constant-acceleration kinematic equations, write a formula that gives vf in terms...

sorry, but would it turn into a free fall question and the acceleration be -9.8? i tried it and it was wrong..

alright well i found the velocity final at 131 m to be 93.40 meters, so would i use the same equation and use that as my velocity initial and my velocity final be 0?

right i understand i need to find those, but can someone start me off in the right direction..

A model rocket is launched straight upward with an initial speed of 54.4 m/s. It accelerates with a constant upward acceleration of 2.20 m/s2 until its engines stop at an altitude of 131 m. What is the maximum height reached by the rocket? How long after lift off does the rocket reach its...

A roller coaster moves 201 ft horizontally, then rises 150 ft at an angle of 27.5o above the horizontal. It then travels 150 ft at an angle of 38.2o below the horizontal. What is the magnitude of its displacement from the starting point at the end of this movement? What is the angle relative to...