Question

A .3 kg toy rocket was launched with a velocity of 3m/s. How much potential energy would it have at the moment it reaches its maximum height? Use the following formulas.

(KE = 1/2 mv2), (PE= m x g x h), (Total energy = PE + KE)

Answer 1

The potential energy of the rocket when it reaches its maximum height is 13.5 J.

What is potential energy?

Potential energy is the energy of a body by virtue of its position in the gravitational field.

To calculate the potential energy it will have at the maximum height, we use the formula below

Formula:

• P.E = mv²/2............. Equation 1

Where:

• P.E = Potential energy of the toy rocket
• m = mass of the toy
• v = velocity of the toy

From the question,

Given:

• m = 3 kg
• v = 3 m/s

Substitute these values into equation 1

• P.E = (3×3²)/2
• P.E = 13.5 J

Hence, The potential energy of the rocket when it reaches its maximum height is 13.5 J.

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