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A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
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Practice Questions
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Q1
A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
150 J
120 J
100 J
75 J
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Kinetic energy KE = 0.5 * m * v² = 0.5 * 12 kg * (5 m/s)² = 150 J.
Questions & Step-by-step Solutions
1 item
Q
Q: A 12 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
Solution:
Kinetic energy KE = 0.5 * m * v² = 0.5 * 12 kg * (5 m/s)² = 150 J.
Steps: 7
Show Steps
Step 1: Identify the mass of the object. The mass (m) is 12 kg.
Step 2: Identify the velocity of the object. The velocity (v) is 5 m/s.
Step 3: Write down the formula for kinetic energy (KE). The formula is KE = 0.5 * m * v².
Step 4: Calculate the square of the velocity. (5 m/s)² = 25 m²/s².
Step 5: Multiply the mass by the square of the velocity. 12 kg * 25 m²/s² = 300 kg*m²/s².
Step 6: Multiply the result by 0.5. 0.5 * 300 kg*m²/s² = 150 J.
Step 7: State the final answer. The kinetic energy is 150 Joules (J).
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