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9. Work & Energy
Intro to Energy & Kinetic Energy
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A baseball of mass is thrown with a speed of . What is its kinetic energy?
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Guida verificata passo dopo passo1
Identify the given quantities: mass \(m = 0.135\ \text{kg}\) and speed \(v = 40.0\ \text{m/s}\).
Recall the formula for kinetic energy, which is the energy an object has due to its motion:
\(KE = \frac{1}{2} m v^2\)
Substitute the given values into the kinetic energy formula:
\(KE = \frac{1}{2} \times 0.135 \times (40.0)^2\)
Calculate the square of the velocity:
\((40.0)^2 = 1600\)
Multiply the values step-by-step to find the kinetic energy:
\(KE = \frac{1}{2} \times 0.135 \times 1600\)
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