A sailboat of mass m is initially at rest, i. e. v(0) = 0. Assume that the force of the wind on the sails in the direction of travel is given by Fw(t) = Bw[v0 − v(t)], where v0 = 2m/s is the magnitude of a strong wind (input to the system) starting at 0 s (i. e., v0 = 2us(t) is a step function of magnitude 2 m/s, where us(t) is the unit step function described in lecture). Assume that the viscous drag of the water on the ship is given by Fb(t) = Bdv(t).

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

electric field is a function of 1/r^2

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