Answer: a) 31.07 * 10^6 N/C ; b) 11.68 * 10^6 N/C
Explanation: in order to solve this problem we have to use the Coulomb force which is given by:
F=k*q1*q2/r^2
( see attach for details)
Below are 3 pieces of cobalt metal . In each, four different magnetic domains are drawn. Each domain is labeled with an arrow in
dicating the direction of the magnetic field in that domain. Which of these bars of cobalt metal has a magnetic field?
O Bar A
O Bar B
O Bar C
O Bar A
O Bar B
O Bar C
1 answer:
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Answer:
Explanation:
given,
mass of block = 3 kg
spring constant k = 500 N/m
kinetic friction coefficient µk = 0.6
speed of block = 5 m/s
F = µk N
F = 0.6 x 3 x 9.8
F = 17.64 N
using energy conservation
250 x² + 17.64 x - 37.5 = 0
on solving
x = 0.354 m
graph is attached below
