A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
Practice Questions
Q1
A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
150 J
120 J
100 J
75 J
Questions & Step-by-Step Solutions
A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
Step 1: Identify the mass of the object. The mass (m) is 12 kg.
Step 2: Identify the velocity of the object. The velocity (v) is 5 m/s.
Step 3: Write down the formula for kinetic energy (KE). The formula is KE = 0.5 * m * v².
Step 4: Calculate the square of the velocity. (5 m/s)² = 25 m²/s².
Step 5: Multiply the mass by the square of the velocity. 12 kg * 25 m²/s² = 300 kg*m²/s².
Step 6: Multiply the result by 0.5. 0.5 * 300 kg*m²/s² = 150 J.
Step 7: State the final answer. The kinetic energy is 150 Joules (J).
Kinetic Energy – Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 0.5 * m * v², where m is mass and v is velocity.