A 5 kg rolling rock has a velocity of 15m/s.What is the rock's kinetic energy?
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Correct answer for this question is 562.5 J
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Therefore the Kinetic Energy of the rock is 562.5 J.
Given:
The mass of the rock = m = 5 kg
Velocity of the rock = v = 15 m/s
To Find:
The Kinetic Energy of the rock.
Solution:
The given question can be solved easily as shown below.
Given that,
The mass of the rock = m = 5 kg
Velocity of the rock = v = 15 m/s
Kinetic Energy of an object = KE = ( 1/2 ) mv²
Substituting the given values in the equation,
⇒ Kinetic Energy of the rock = ( 1/2 ) × 5 × 15²
⇒ Kinetic Energy of the rock = 2.5 × 225 = 562.5
Therefore the Kinetic Energy of the rock is 562.5 J.
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