A 50 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
Practice Questions
Q1
A 50 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
100 J
200 J
400 J
800 J
Questions & Step-by-Step Solutions
A 50 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
Step 1: Identify the mass (m) of the object. In this case, m = 50 kg.
Step 2: Identify the velocity (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: Substitute the values into the formula: KE = 0.5 * 50 kg * (4 m/s)².
Step 5: Calculate (4 m/s)², which is 16 m²/s².
Step 6: Multiply 50 kg by 16 m²/s² to get 800 kg*m²/s².
Step 7: Multiply 800 kg*m²/s² by 0.5 to get 400 J.
Step 8: Conclude that the kinetic energy of the object is 400 Joules.
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.
