Homework Statement
There is a 3nC charge at (-3,0), -6nC at (0,2) and 5nC at (1,0). What is the electric field at the origin (0,0)?
Homework Equations
##E = \frac{Q}{4 \pi \epsilon_0 r^2}##
The Attempt at a Solution
i think its ##(\frac{1}{4 \pi \epsilon_0})(-\frac{14}{3} i - \frac{3}{2} j)##...
Homework Statement
Derive the relationship bewteen x_{max}, A_{+}, A_{-} and \phi
Homework Equations
x(t) = e^{\gamma t}(A_{+}e^{i \omega_d t} + A_{-}e^{-i \omega_d t})
x(t) = x_{max} e^{\gamma t} cos(\omega_d t + \phi)
The Attempt at a Solution
I know the e^{\gamma t} cancels and for the...
Homework Statement
Instead of using a ballistic pendulum, a bullet with velocity u is fired at a stationary solid ball resting on a surface. If the bullet deflects at an angle of 30◦ to its original path and the ball is nine times more massive than the bullet, what is the velocity of the ball...
Homework Statement
Fast moving α particles of mass m make collisions in a cloud chamber with gas atoms of mass M and negligible initial velocity. After a collision, the velocities of the scattered α particles and the recoiling gas atoms are v and V respectively, the former being inclined at an...
i got it now its I=M[(R_out)^2+(R_in)^2]/2 as the density becomes M/[pi*h*[(R_out)^2-(R_in)^2] and when you sub it back into the intergral it becomes [(R_out)^4-(R_in)^4]/[(R_out)^2-(R_in)^2] = [(R_out)^2+(R_in)^2] because of difference of 2 squares
Homework Statement
Consider a hollow cylinder of mass M with an outer radius R_out = 10 cm and an unknown inner radius R_in. If the hollow cylinder is to roll down an incline in the same time as a spherical shell of the same mass and the same outer radius, calculate R_in.
Homework Equations...
Homework Statement
A 1500 kg car is traveling at a speed of 30.0 m s-1 when the driver slams on the brakes and skids to a halt. Determine the stopping distance if the car is traveling down a 10o slope. The coefficient of kinetic friction between the car
and the road is 0.80.
Homework Equations...