A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic ener
Practice Questions
Q1
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
9 J
6 J
18 J
12 J
Questions & Step-by-Step Solutions
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
Step 1: Identify the mass of the body. In this case, the mass (m) is 2 kg.
Step 2: Identify the velocity of the body. Here, the velocity (v) is 3 m/s.
Step 3: Write down the formula for kinetic energy (KE). The formula is KE = 1/2 * m * v^2.
Step 4: Substitute the values of mass and velocity into the formula. This gives us KE = 1/2 * 2 * (3^2).
Step 5: Calculate the square of the velocity. 3^2 = 9.
Step 6: Substitute the squared value back into the equation. Now we have KE = 1/2 * 2 * 9.
Step 7: Multiply 1/2 by 2. This equals 1.
Step 8: Now multiply 1 by 9. This gives us KE = 9 J.
Kinetic Energy – Kinetic energy is the energy possessed by an object due to its motion, calculated using the formula KE = 1/2 * m * v^2, where m is mass and v is velocity.
