If a 10 kg object is moving with a speed of 2 m/s, what is its kinetic energy?
Practice Questions
Q1
If a 10 kg object is moving with a speed of 2 m/s, what is its kinetic energy?
10 J
20 J
40 J
80 J
Questions & Step-by-Step Solutions
If a 10 kg object is moving with a speed of 2 m/s, what is its kinetic energy?
Step 1: Identify the mass (m) of the object. In this case, m = 10 kg.
Step 2: Identify the speed (v) of the object. Here, v = 2 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, (2 m/s)² = 4 m²/s².
Step 5: Substitute the values into the formula: KE = 0.5 × 10 kg × 4 m²/s².
Step 6: Multiply 0.5 by 10 to get 5.
Step 7: Now multiply 5 by 4 to get 20.
Step 8: The kinetic energy (KE) is 20 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.
