A bird has a mass of 0.8 kg and flies at a speed of 11.2 m/s. How much kinetic energy does the bird have?A.100.3 JB.50.2 JC.77.2 JD.4.5 JSUBMITarrow_backPREVIOUS
Question
A bird has a mass of 0.8 kg and flies at a speed of 11.2 m/s. How much kinetic energy does the bird have?A.100.3 JB.50.2 JC.77.2 JD.4.5 JSUBMITarrow_backPREVIOUS
Solution
The kinetic energy of an object can be calculated using the formula:
KE = 1/2 * m * v^2
where: KE is the kinetic energy, m is the mass of the object, and v is the speed of the object.
Substituting the given values into the formula:
KE = 1/2 * 0.8 kg * (11.2 m/s)^2
KE = 0.4 kg * 125.44 m^2/s^2
KE = 50.176 J
So, the closest answer is B. 50.2 J.
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