A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
Practice Questions
Q1
A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
8 J
4 J
16 J
2 J
Questions & Step-by-Step Solutions
A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
Step 1: Identify the mass (m) of the object. In this case, the mass is 4 kg.
Step 2: Identify the velocity (v) of the object. Here, the velocity is 2 m/s.
Step 3: Use the formula for kinetic energy (KE), which is KE = 1/2 * m * v^2.
Step 4: Substitute the values into the formula: KE = 1/2 * 4 * (2^2).
Step 5: Calculate (2^2), which is 4.
Step 6: Now substitute back: KE = 1/2 * 4 * 4.
Step 7: Calculate 1/2 * 4, which is 2.
Step 8: Finally, multiply 2 by 4 to get KE = 8 J.
Kinetic Energy – Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 * m * v^2, where m is mass and v is velocity.
