Recent content by Oomair

Homework Statement A plastic wire 8.50cm long carries a charge density of +175 nC/m distributed uniformly along its length. it is lying on a horizontal tabletop A) find the magnitude and direction of the electric field this wire produces at a point 6.00 cm directly above its midpoint...

i know that normal force is not always equal to mg, but in this situation the board is touching the ground at all time, and the normal force must be equal to the weight of the board so the system can stay in static equilibrium

Homework Statement A uniform board of length 2.4 m and mass m = 5.1 kg has one end on the ground. With the aid of a horizontal force applied at the upper end by means of an attached horizontal rope, the board is held at an angle θ with respect to the vertical The coefficient of static...

i got it, thanks for the help

which F1 are you talking about? and which mg?

[SOLVED] Equilibrium problem Homework Statement A uniform beam of mass 76 kg and length 3 m rests on two pivots, one at the left edge and one 2.4 m from the left edge. How far to the right of the right pivot can a mass of 150 kg be placed without the beam tipping? Homework Equations...

Homework Statement is it possible to use green's theorem to derive the moment of inertia of solid objects? Homework Equations The Attempt at a Solution

Homework Statement A pipe made of aluminum with a density of 2.7 g/cm3 is a right cylinder 43 cm long whose outer diameter is 4.8 cm and whose inner diameter is 2.4 cm. What is the rotational inertia about the central axis of the pipe? Note that the rotational inertia of the thick cylinder can...

but should'nt X1 and Y1 be treated as the reference line?

how do i know the center of mass if I am not given the mass? i broke it into 2 parts (ycm)(Mt) = (m1)(Y1) +(m2)(Y2) Y1 = 0 Y2 = .5, but the unknowns are mass (xcm)(Mt) = (m1)(X1) + (m2)(X2) X1 = 0 X2 = .8

[SOLVED] Need to find center of mass of a rod Homework Statement Where is the center of mass of a uniform, L-shaped iron rod of sides X = 0.8 m and Y = 0.5 m, respectively? Take the corner to be at (x,y) = (0,0), with the X and Y sides along those axes, respectively. (Assume that the rod is...

[SOLVED] Finding Center of mass Homework Statement Three cubes, of side 0, 20, and 30, are placed next to one another (in contact) with their centers along a straight line as shown in the figure. What is the position, along this line, of the CM of this system? Assume the cubes are made of...

The book is saying that the collision is perfectly elastic, but I am confused on how i would relate the speeds in terms of energy

draw the motion of the ball, what i mean is to draw the speed of the ball as in x and y vector components so if the ball is striking the surface at 60 degree angle, then it has sin and cosine components of speed,

Homework Statement A 2.5 kg block slides along a frictionless tabletop at 6.0 m/s toward a second block (at rest) of mass 4.5 kg. A coil spring, which obeys Hooke's law and has spring constant k = 860 N/m, is attached to the second block in such a way that it will be compressed when struck...