a body of mass 500g suspended from the end of the spiral spring which obeys hooks law, produce an extension of 10cm if the mass is pulled down a distance of 5cm and released, calculate the force constant of the spray, frequency, period of oscillation, angular speed of the body and energy system

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm