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The potential energy of a catapult was completely converted into kinetic energy by releasing a small stone with a mass of 20 grams. The velocity of the stone when it reached the target was 15.0 meters/second. What was the value of the kinetic energy of the stone when it reached the target? 2.05 joules 2.25 joules 3.20 joules 4.43 joules

Respuesta :

popalabdulqayou
kinetic Energy = 1/2 *mass*velocity^2
we need mass in kg and velocity in m/s
so 20g/1* 1kg/1000g = 1/50 kg
K= 1/2 mv^2
K= 1/2 (1/50)(15.0m/s)^2= 2.25 Joules
hit brainliest answer.
ghostcd40

Answer : The correct option is, 2.25 joules.

Explanation : Given,

Mass of the stone = 20 g

Velocity of the stone = 15 m/s

Formula used for kinetic energy is :

where,

K.E = kinetic energy of the stone

m = mass of the stone

v = velocity of the stone

Now put all the given values in this formula, we get the kinetic energy of the stone.

Therefore, The kinetic energy of the stone is, 2.25 joules.

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