Question

A ship of mass 3×10^7kg initially at rest is pulled by a force of 5×10^4N through a distance of 3m. Assuming that the resistance due to water is negligible, the speed of the ship is?

(a) 1.5m/s

(b) 60m/s

(c) 0.1m/s

(d) 5m/s

I have been asked this question in an interview.

The query is from Laws of Nature topic in portion Laws of Motion of Engineering Physics I

Answer 1

Correct answer is (c) 0.1m/s

To explain: a = F/m = (5×10^4)/(3×10^7 )

Speed attained by the ship, v = √2as = 0.1m/s.