The unit of energy equivalent to 1 Joule is: (2023)

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Question: The unit of energy equivalent to 1 Joule is: (2023)

Options:

Correct Answer: Both 1 kg·m²/s² and 1 N·m

Exam Year: 2023

Solution:

1 Joule is defined as 1 kg·m²/s² and also equals 1 N·m, hence both are correct.

The unit of energy equivalent to 1 Joule is: (2023)

The unit of energy equivalent to 1 Joule is: (2023)

Step 1: Understand that 1 Joule is a unit of energy.
Step 2: Know that 1 Joule can be defined in terms of mass, distance, and time.
Step 3: Remember the formula for Joules: 1 Joule = 1 kg·m²/s².
Step 4: Recognize that Joules can also be expressed as force times distance.
Step 5: Recall that 1 Newton (N) is the force needed to accelerate 1 kg at 1 m/s².
Step 6: Therefore, 1 Joule can also be written as 1 N·m (Newton meter).
Step 7: Conclude that both definitions (1 kg·m²/s² and 1 N·m) are correct for 1 Joule.

Unit of Energy – Understanding that 1 Joule is a unit of energy defined as 1 kg·m²/s² or 1 N·m.
Equivalence of Units – Recognizing that different expressions can represent the same physical quantity.