What is the kinetic energy of a 4 kg object moving at a speed of 3 m/s? (2015)

₹0.0

Question: What is the kinetic energy of a 4 kg object moving at a speed of 3 m/s? (2015)

Options:

Correct Answer: 12 J

Solution:

Kinetic Energy (KE) = 0.5 × mass × velocity² = 0.5 × 4 kg × (3 m/s)² = 18 J.

What is the kinetic energy of a 4 kg object moving at a speed of 3 m/s? (2015)

What is the kinetic energy of a 4 kg object moving at a speed of 3 m/s? (2015)

Step 1: Identify the mass of the object. In this case, the mass is 4 kg.
Step 2: Identify the speed of the object. Here, the speed is 3 m/s.
Step 3: Write down the formula for kinetic energy: KE = 0.5 × mass × velocity².
Step 4: Substitute the mass and speed into the formula: KE = 0.5 × 4 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: 4 kg × 9 m²/s² = 36 kg·m²/s².
Step 7: Multiply by 0.5: 0.5 × 36 kg·m²/s² = 18 J.
Step 8: Conclude that the kinetic energy of the object is 18 Joules.

No concepts available.