If a 5 kg object is moving with a velocity of 3 m/s, what is its kinetic energy?

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Question: If a 5 kg object is moving with a velocity of 3 m/s, what is its kinetic energy? (2023)

Options:

Correct Answer: 45 J

Exam Year: 2023

Solution:

Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 5 kg × (3 m/s)² = 22.5 J

If a 5 kg object is moving with a velocity of 3 m/s, what is its kinetic energy? (2023)

If a 5 kg object is moving with a velocity of 3 m/s, what is its kinetic energy? (2023)

Step 1: Identify the mass of the object. In this case, the mass is 5 kg.
Step 2: Identify the velocity of the object. Here, the velocity is 3 m/s.
Step 3: Write down the formula for kinetic energy: Kinetic Energy = 0.5 × mass × velocity².
Step 4: Substitute the mass and velocity into the formula: Kinetic Energy = 0.5 × 5 kg × (3 m/s)².
Step 5: Calculate the square of the velocity: (3 m/s)² = 9 m²/s².
Step 6: Multiply the mass by the squared velocity: 5 kg × 9 m²/s² = 45 kg·m²/s².
Step 7: Multiply by 0.5: 0.5 × 45 kg·m²/s² = 22.5 J.
Step 8: Conclude that the kinetic energy of the object is 22.5 Joules.

Kinetic Energy – Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 0.5 × mass × velocity².