A 15 kg object is moving at a speed of 4 m/s. What is its kinetic energy?

A 15 kg object is moving at a speed of 4 m/s. What is its kinetic energy?

Correct Answer: 120 J

Step 1: Identify the mass (m) of the object. In this case, m = 15 kg.
Step 2: Identify the speed (v) of the object. Here, v = 4 m/s.
Step 3: Use the formula for kinetic energy (KE), which is KE = 0.5 × m × v².
Step 4: Calculate v² (the speed squared). So, v² = (4 m/s) × (4 m/s) = 16 m²/s².
Step 5: Substitute the values into the kinetic energy formula: KE = 0.5 × 15 kg × 16 m²/s².
Step 6: Calculate 0.5 × 15 = 7.5.
Step 7: Now multiply 7.5 by 16: 7.5 × 16 = 120.
Step 8: Therefore, the kinetic energy of the object is 120 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.