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A 3 kg object is moving with a velocity of 2 m/s. What is its kinetic energy? (2
A 3 kg object is moving with a velocity of 2 m/s. What is its kinetic energy? (2021)
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Practice Questions
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Q1
A 3 kg object is moving with a velocity of 2 m/s. What is its kinetic energy? (2021)
6 J
12 J
3 J
9 J
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Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 3 kg * (2 m/s)^2 = 6 J
Questions & Step-by-step Solutions
1 item
Q
Q: A 3 kg object is moving with a velocity of 2 m/s. What is its kinetic energy? (2021)
Solution:
Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 3 kg * (2 m/s)^2 = 6 J
Steps: 8
Show Steps
Step 1: Identify the mass (m) of the object. In this case, m = 3 kg.
Step 2: Identify the velocity (v) of the object. Here, v = 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 * 3 kg * (2 m/s)^2.
Step 5: Calculate (2 m/s)^2, which is 4 m^2/s^2.
Step 6: Now substitute this back into the equation: KE = 1/2 * 3 kg * 4 m^2/s^2.
Step 7: Multiply 3 kg by 4 m^2/s^2 to get 12 kg*m^2/s^2.
Step 8: Now multiply by 1/2: KE = 1/2 * 12 kg*m^2/s^2 = 6 J.
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