Question

(4) None of these
A ship of mass 3 x 107 kg initially at rest is pulled
by a force of 5 x 104 N through a distance of 3m.
Neglecting friction, the speed of the ship at this
moment is :
(1) 3.0 m/s
(2) 1.5 m/s
(3) 0.1 m/s
(4) 2 m/s​

Answer 1

Answer:

option ( 3 ) 0.1 m/s

Explanation:

Given :

• Mass = 3×10^7 Kg

• Force = 5×10^4 Newton

• Initial velocity = 0 ( initially at rest )

• distance = 3 m

F = ma

→ 5×10^4 = 3×10^7 * a

→ Acceleration ( a ) =5/3 *10^3 m/sec^2

Now applying equation of motion :

-» v^2 = u^2 + 2as

→ v^2 = 2*5/3*10^3*3

Velocity = 0.1 m/s