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A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
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Practice Questions
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Q1
A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
8 J
4 J
16 J
2 J
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Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 4 * (2^2) = 8 J
Questions & Step-by-step Solutions
1 item
Q
Q: A 4 kg object is moving with a velocity of 2 m/s. What is its kinetic energy?
Solution:
Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 4 * (2^2) = 8 J
Steps: 8
Show Steps
Step 1: Identify the mass (m) of the object. In this case, the mass is 4 kg.
Step 2: Identify the velocity (v) of the object. Here, the velocity is 2 m/s.
Step 3: Use the formula for kinetic energy (KE), which is KE = 1/2 * m * v^2.
Step 4: Substitute the values into the formula: KE = 1/2 * 4 * (2^2).
Step 5: Calculate (2^2), which is 4.
Step 6: Now substitute back: KE = 1/2 * 4 * 4.
Step 7: Calculate 1/2 * 4, which is 2.
Step 8: Finally, multiply 2 by 4 to get KE = 8 J.
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