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A 10 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
A 10 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
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Q1
A 10 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
80 J
40 J
20 J
160 J
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Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 10 kg × (4 m/s)² = 80 J
Questions & Step-by-step Solutions
1 item
Q
Q: A 10 kg object is moving with a velocity of 4 m/s. What is its kinetic energy?
Solution:
Kinetic Energy = 0.5 × mass × velocity² = 0.5 × 10 kg × (4 m/s)² = 80 J
Steps: 8
Show Steps
Step 1: Identify the mass of the object. In this case, the mass is 10 kg.
Step 2: Identify the velocity of the object. Here, the velocity is 4 m/s.
Step 3: Use the formula for kinetic energy, which is Kinetic Energy = 0.5 × mass × velocity².
Step 4: Substitute the values into the formula: Kinetic Energy = 0.5 × 10 kg × (4 m/s)².
Step 5: Calculate the square of the velocity: (4 m/s)² = 16 m²/s².
Step 6: Multiply the mass by the squared velocity: 10 kg × 16 m²/s² = 160 kg·m²/s².
Step 7: Multiply by 0.5: 0.5 × 160 kg·m²/s² = 80 J.
Step 8: Conclude that the kinetic energy of the object is 80 Joules.
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