JEE Main Physics question
The mass of a ship is 2 × 10⁷ kg. On applying a force of 25 × 10⁵ N, it is displaced through 25 m. After the displacement, the velocity acquired by the ship will be
Answer: (D)
Solution
By the work-energy theorem: Fs = ½mv² ⟹ v = √(2Fs/m) = √(2 × 2.5×10⁶ × 25 / 2×10⁷) = √6.25 = 2.5 m/s.