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A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
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Practice Questions
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A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
9 J
6 J
3 J
12 J
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Kinetic energy is given by KE = 0.5 * m * v² = 0.5 * 2 kg * (3 m/s)² = 9 J.
Questions & Step-by-step Solutions
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Q
Q: A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
Solution:
Kinetic energy is given by KE = 0.5 * m * v² = 0.5 * 2 kg * (3 m/s)² = 9 J.
Steps: 8
Show Steps
Step 1: Identify the mass of the object. In this case, the mass (m) is 2 kg.
Step 2: Identify the velocity of the object. Here, the velocity (v) is 3 m/s.
Step 3: Write down the formula for kinetic energy (KE). The formula is KE = 0.5 * m * v².
Step 4: Substitute the mass and velocity into the formula. This gives us KE = 0.5 * 2 kg * (3 m/s)².
Step 5: Calculate the square of the velocity. (3 m/s)² = 9 m²/s².
Step 6: Multiply the mass by the squared velocity. 2 kg * 9 m²/s² = 18 kg*m²/s².
Step 7: Multiply by 0.5. 0.5 * 18 kg*m²/s² = 9 J.
Step 8: Conclude that the kinetic energy of the object is 9 Joules (J).
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