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The kinetic energy (in joules) of a moving object can be calculated from the expression 1/2mv^2, where m is the mass of the object in kilograms and v is its speed in meters per second. Find the kinetic energy of a 0.145 - kg baseball that is thrown at a speed of 40 meters per second. E= ? Joules

Verified Answer :

Kirbymaster63

1/2×0.145×40²
1/2×0.145×1600
1/2×232
232/2
116 Joules

JeanaShupp

Answer: \(116\text{ joules}\)


Step-by-step explanation:

Given: Mass of baseball=0.145 kg

Speed of baseball=40 meters per second

Also it is given that The kinetic energy (in joules) of a moving object can be calculated from the expression \(\frac{1}{2}mv^2\) , where 'm' is the mass of the object in kilograms and 'v' is its speed in meters per second.

Thus, the kinetic energy of baseball=\(\frac{1}{2}(0.145)(40)^2\)

\(\frac{1}{2}(0.145)(1600)=116\text{ joules}\)

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