What is the potential energy of a 95kg object at a height of 36m above the ground?

Prepare for the Refrigeration Operator Level 1 Exam with our comprehensive study tools. Use flashcards, multiple-choice questions, and explanations to get exam-ready. Boost your chances of passing!

To determine the potential energy of an object, the formula used is:

Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h)

In this scenario, the mass of the object is 95 kg, the height is 36 m, and the gravitational acceleration (g) is approximately 9.81 m/s² (standard value on Earth's surface).

Calculating the potential energy:

PE = 95 kg × 9.81 m/s² × 36 m

First, calculate the product of mass and gravitational acceleration:

95 kg × 9.81 m/s² = 931.95 N (this is the weight of the object in Newtons)

Next, multiply this by the height:

931.95 N × 36 m = 33514.2 J

Since 1 kJ is equal to 1000 J, converting joules to kilojoules gives:

33514.2 J ÷ 1000 = 33.5142 kJ

Rounding for simplicity, this value can be approximated to 33.55 kJ, making the first option the correct answer. This calculation illustrates how the height and mass directly influence the potential energy, reinforcing

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy