Question

The kinetic of a boat is calculated at 52, 000 J. If the boat has mass of 39, 000kg with what velocity is it moving?

Answer 1

Answer:

Velocity = 1.634 m/s

Explanation:

Given that,

Mass = m = 39000 kg

Kinetic energy = KE = 52000 J

Velocity = v = ?

We know that,

$\boxed{KE = \frac{1}{2}mv^{2} }$

Putting the values in we get,

52000 = 1/2 * 39000 * v²

v² = 52000 * 2/39000

v² = 2.67

v = √2.67

v = 1.634 m/s

Answer 2

Answer:

Given:

• The kinetic of a boat is calculated at 52, 000 J. If the boat has mass of 39, 000kg.

Find:

• What velocity is it moving?

Using formula:

★ ${\sf{\underline{\boxed{\red{\sf{KE = \dfrac{1}{2} \times mv^{2} }}}}}}$

Calculations:

⇢ $\sf{52000 = \dfrac{1}{2} \times 39000 \times v^{2}}$

⇢ $\sf{52000 \times \dfrac{2}{39000}}$

⇢ $\sf{2.67}$

⇢ $\sf{\sqrt{2.67}}$

⇢ $\sf{1.634 \: m/s}$

Therefore, 1.634 m/s is the required answer.