A 1500 kg car is moving at a speed of 25 m/s. What is its kinetic energy? (2021)

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Question: A 1500 kg car is moving at a speed of 25 m/s. What is its kinetic energy? (2021)

Options:

Correct Answer: 1,875,000 J

Exam Year: 2021

Solution:

Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 1500 kg × (25 m/s)² = 468,750 J

A 1500 kg car is moving at a speed of 25 m/s. What is its kinetic energy? (2021)

A 1500 kg car is moving at a speed of 25 m/s. What is its kinetic energy? (2021)

Correct Answer: 468750 J

Step 1: Identify the formula for kinetic energy, which is Kinetic Energy = 0.5 × mass × velocity².
Step 2: Write down the mass of the car, which is 1500 kg.
Step 3: Write down the speed of the car, which is 25 m/s.
Step 4: Calculate the velocity squared (25 m/s)², which equals 625 m²/s².
Step 5: Multiply the mass (1500 kg) by the velocity squared (625 m²/s²). This gives you 1500 kg × 625 m²/s² = 937,500 kg·m²/s².
Step 6: Multiply the result from Step 5 by 0.5. So, 0.5 × 937,500 kg·m²/s² = 468,750 J.
Step 7: The final answer is the kinetic energy, which is 468,750 Joules (J).

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