Friction stole the book's kinetic energy, and turned it into heat energy ... which blew away in the breeze.
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Ur answer is 3 and i'm sure of it
Answer:
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Explanation:
Kinetic energy is calculated by using formula:
Ek = 1/2*m*v^2
Now we replace values of mass and speed in this formula.
Ek = 1/2*10*3^2 = 45.0J
When you have a formula and all variable values are given in the text of question just replace variable values in equation and find the final value.