A car of mass 1000 kg is moving with a speed of 20 m/s. What is its kinetic ener

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Question: A car of mass 1000 kg is moving with a speed of 20 m/s. What is its kinetic energy?

Options:

Correct Answer: 400,000 J

Solution:

Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 1000 kg × (20 m/s)² = 200,000 J.

A car of mass 1000 kg is moving with a speed of 20 m/s. What is its kinetic energy?

A car of mass 1000 kg is moving with a speed of 20 m/s. What is its kinetic energy?

Correct Answer: 200000 J

Step 1: Identify the mass of the car, which is 1000 kg.
Step 2: Identify the speed of the car, which is 20 m/s.
Step 3: Use 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 × 1000 kg × (20 m/s)².
Step 5: Calculate (20 m/s)², which is 400 m²/s².
Step 6: Multiply 1000 kg by 400 m²/s² to get 400,000 kg·m²/s².
Step 7: Multiply 400,000 kg·m²/s² by 0.5 to get 200,000 J.
Step 8: Conclude that the kinetic energy of the car is 200,000 Joules.

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