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A 5 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
A 5 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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Q1
A 5 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
22.5 J
30 J
45 J
60 J
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Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 5 kg × (3 m/s)² = 22.5 J.
Questions & Step-by-step Solutions
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Q
Q: A 5 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
Solution:
Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 5 kg × (3 m/s)² = 22.5 J.
Steps: 9
Show Steps
Step 1: Identify the mass of the object. The mass is 5 kg.
Step 2: Identify the velocity of the object. The velocity is 3 m/s.
Step 3: Write down the formula for kinetic energy: Kinetic Energy = 0.5 × mass × velocity².
Step 4: Substitute the mass into the formula: Kinetic Energy = 0.5 × 5 kg × velocity².
Step 5: Calculate the square of the velocity: (3 m/s)² = 9 m²/s².
Step 6: Substitute the squared velocity into the formula: Kinetic Energy = 0.5 × 5 kg × 9 m²/s².
Step 7: Multiply 0.5 by 5 kg to get 2.5 kg.
Step 8: Multiply 2.5 kg by 9 m²/s² to get 22.5 J.
Step 9: Conclude that the kinetic energy of the object is 22.5 Joules.
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