Question

A toy plane with a mass of 1.5 kg is flying in the air at 8.0 m/s. What is its kinetic energy?

Answer 1

Answer:

KE=48J

Explanation:

You use the equation:

KE=1/2mv^2

KE=1/2(1.5kg)(8.0m/s)^2

KE=48J

Answer 2

Given : A toy plane has a mass of 1.5kg . It is flying in air at a speed of 8m/s .

To Find : The Kinetic energy of the plane .

Solution : The mass of the toy plane is 1.5kg and Velocity is 8.0 m / s . So we know the formula to find the kinetic energy as ,

$\boxed{\red{\bf Energy_{Kinetic}=\dfrac{1}{2}mv^2}}$

On substituting the respective values,

⇒ KE = ½mv².

⇒ KE = ½ × 1.5 kg × (8 m/s)².

⇒ KE = ½ × 1.5 kg × 64m²/s² .

⇒ KE = 48 J .

Hence the Kinetic energy of the plane is 48Joules.