A 10 kg object is moving with a speed of 3 m/s. What is its kinetic energy?

A 10 kg object is moving with a speed of 3 m/s. What is its kinetic energy?

Correct Answer: 45 J

Step 1: Identify the mass of the object. In this case, the mass is 10 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: Kinetic Energy = 0.5 × mass × velocity².
Step 4: Substitute the mass and speed into the formula: Kinetic Energy = 0.5 × 10 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: 10 kg × 9 m²/s² = 90 kg·m²/s².
Step 7: Multiply by 0.5: 0.5 × 90 kg·m²/s² = 45 J.
Step 8: Conclude that the kinetic energy of the object is 45 Joules.

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