A body of mass 100 g moving on a test track has final KE of 50 J after traveling a distance of 10 cm. Assuming `90%` loss of energy due to friction, find the intial speed of the body

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the relationship between initial and final kinetic energy
Given that 90% of the initial kinetic energy (KE_initial) is lost due to friction, only 10% of the initial kinetic energy remains as the final kinetic energy (KE_final). Therefore, we can express this relationship mathematically as:
\[ KE_{final} = 0.1 \times KE_{initial} \]

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