Question

A ship of mass 3 $\times$ 10${}^7$ Kg is initially at rest. It is being pulled by a force of 5 $\times {10}^4$ N through a distance 3 m. If the air resistance is negligible, then the speed of the ship will be

• A. 5 m/s
• B. 1.5 m/s
• C. 60 m/s
• D. 0.1 m/s

Answer 1

Answer: (D)

0.1 m/s

We have,
$F=ma$

$\therefore a=\frac{F}{m}$

Also, $v^2=u^2+2as$

But, $u=0$

$\therefore v^2=2\times \frac{5\times {10}^4}{3\times {10}^7}\times 3$

$\therefore v=0.1m/s$