An object of mass 10 kg is moving with a velocity of 3 m/s. What is its kinetic
Practice Questions
Q1
An object of mass 10 kg is moving with a velocity of 3 m/s. What is its kinetic energy? (2022)
45 J
30 J
60 J
15 J
Questions & Step-by-Step Solutions
An object of mass 10 kg is moving with a velocity of 3 m/s. What is its kinetic energy? (2022)
Step 1: Identify the mass of the object. In this case, the mass (m) is 10 kg.
Step 2: Identify the velocity of the object. Here, the velocity (v) is 3 m/s.
Step 3: Use the formula for kinetic energy (KE), which is KE = 0.5 × m × v².
Step 4: Substitute the values into the formula: KE = 0.5 × 10 kg × (3 m/s)².
Step 5: Calculate (3 m/s)², which is 9 m²/s².
Step 6: Multiply 10 kg by 9 m²/s² to get 90 kg·m²/s².
Step 7: Multiply 90 kg·m²/s² by 0.5 to get 45 J.
Step 8: Conclude that the kinetic energy of the object is 45 Joules.
Kinetic Energy – Kinetic energy is the energy possessed by an object due to its motion, calculated using the formula KE = 0.5 × m × v², where m is mass and v is velocity.
