Homework Statement
Suppose a uniform electric field of magnitude 115.0 N/C exists in a region of space. How far apart are a pair of equipotential surfaces whose potentials differ by 2.0 V?
Homework Equations
1 N/C = 1 V/m
The Attempt at a Solution
I know 115.0 N/C is the same...
Homework Statement
Find the potential at points a and b in the diagram for charges Q1 = +1.60 nC and Q2 = -1.60 nC.
I know b is 0
Homework Equations
V = kQ/r
The Attempt at a Solution
I tried this using the equation and got
8.99e9 * [( +1.60e-6 / .05) + ( -1.60e-6 / .15...
Homework Statement
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.4 Hz. What is the total mass of the wire? ( in kg)
Homework Equations
The only relevant equation I could find is...
A flywheel of mass 183 kg has an effective radius of 0.63 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel).
(a) What torque is required to bring this wheel from rest to a speed of 120 rpm in a time interval of 34.3 s?
(b) How much...
The last part of the question states The speed limit for each car was 70 km/h. And I know that only the lighter car was speeding.
So V1i > 70 km/s
When i solve for my initial velocities using 19.8 and this formula
V1i = ((m1 + m2) / m1) Vf cos 30 putting in 19.8 i get
V1i = 36.8 km/s...
F = .8 m g
F = .8 * 2435 * 9.8
F = 19090.4 N
a = F/m
a = 19090.4 / 2435
a = 7.84 m/s
I think this is right but not sure after.
Vf^2 - Vi^2 = 2ax
setting Vf to 0 I get a Vi = 19.8
and i know this Velocity is too slow?
A police officer is investigating the scene of an accident where two cars collided at an intersection. One car with a mass of 1135 kg moving west had collided with a 1300 kg car moving north. The two cars, stuck together, skid at an angle of 30° north of west for a distance of 25 m. The...
I have a simple problem that i can't seem to get right.
An ideal spring has a spring constant k = 22.0 N/m. What is the amount of work that must be done to stretch the spring 0.70 m from its relaxed length?
I tried W = (-)1/2 k x^2
= - (.5)(22.0) (.7^2)
=...