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an object slides down an inclined plane from an initial height of 30m,its velocity at the foot of the slope is 20ms¯¹. The percentage of its initial potential energy which is dissipated​

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MathPhys

Answer:

32%

Explanation:

Initial potential energy is:

PE = mgh

PE = m (9.8 m/s²) (30 m)

PE = 294m

Final kinetic energy is:

KE = ½ mv²

KE = ½ m (20 m/s)²

KE = 200m

The difference in energy is 94m. The percentage of the initial potential energy is:

94m / 294m × 100% = 32%

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