Question

A ship whose mass is 3×10⁷ kg is at rest.It is pulled a distance of 3m by applying a force 5×10⁴.If the friction of water is negligible , then find speed of ship.(Ans=0.1m/s)

Answer 1

acceleration of ship a=5*104 N/ 3*107 KG
=5/3 *10-3 m/sec2
speed of the ship after movieng 3 m
v2 =u2 +2aS
=0 +2* 5/3 *10-3 * (3)
= 10-2
v=0.1 m/sec