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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

Sagot :

Kirbymaster63id
1/2×0.145×40²
1/2×0.145×1600
1/2×232
232/2
116 Joules
JeanaShuppid

Answer: [tex]116\text{ joules}[/tex]


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 [tex]\frac{1}{2}mv^2[/tex] , 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=[tex]\frac{1}{2}(0.145)(40)^2[/tex]

[tex]\frac{1}{2}(0.145)(1600)=116\text{ joules}[/tex]

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