Question: If a 10 kg object is moving with a velocity of 4 m/s, what is its kinetic energy?
Options:
80 J
40 J
20 J
160 J
Correct Answer: 80 J
Solution:
Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 10 * (4^2) = 80 J
If a 10 kg object is moving with a velocity of 4 m/s, what is its kinetic energy
Practice Questions
Q1
If 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
Questions & Step-by-Step Solutions
If a 10 kg object is moving with a velocity of 4 m/s, what is its kinetic energy?
Step 1: Identify the mass (m) of the object. In this case, m = 10 kg.
Step 2: Identify the velocity (v) of the object. Here, v = 4 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 * 10 * (4^2).
Step 5: Calculate (4^2), which is 16.
Step 6: Now substitute back: KE = 1/2 * 10 * 16.
Step 7: Calculate 1/2 * 10, which is 5.
Step 8: Now multiply 5 by 16 to get KE = 80 J.
Kinetic Energy – Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 * m * v^2, where m is mass and v is velocity.
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