ABSA 4th Class Power Engineer Certificate of Competency – Part A 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 765

A body with a mass of 88 kg is moving at 13.89 m/s. What is its kinetic energy?

8,488 J

To find the kinetic energy of a body, you can use the kinetic energy formula, which is expressed as:

\[ KE = \frac{1}{2} mv^2 \]

where $ KE $ is the kinetic energy, $ m $ is the mass of the body, and $ v $ is its velocity.

Given the mass of the body is 88 kg and the velocity is 13.89 m/s, you can substitute these values into the formula:

1. First, calculate $ v^2 $:

\[ v^2 = (13.89\, \text{m/s})^2 = 193.5121\, \text{m}^2/\text{s}^2 \]

2. Next, multiply by the mass and divide by 2:

\[ KE = \frac{1}{2} \times 88 \, \text{kg} \times 193.5121 \, \text{m}^2/\text{s}^2 \]

\[ KE = 44 \times 193.5121 = 8524.57 \, \text{J} \]

Upon rounding, this value is approximately 8,

1.22 kJ

13.89 kJ

611.11 J

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