Explanation:
Given,
The mass of boat (m) = 2000 kg and
Speed (v) = 5.0 [tex]m.s^{-1}[/tex]
To find, the kinetic energy of boat (KE) = ?
We know that,
Kinetic energy = [tex]\dfrac{1}{2} mv^{2}[/tex]
= [tex]\dfrac{1}{2} \times 2000 \times 5.0^{2} J[/tex]
= 1000 × 25 J
= 25000 J
= [tex]\dfrac{25000}{1000}[/tex] KJ [ ∵ 1 KJ = 1000 J]
= 25 KJ
∴ The kinetic energy of boat (KE) = 25000 J or, 25 KJ
