A trolly of mass 200kg moves with a uniform speed of 36 km`//`h on a frictionless track. A child of mass 20kg runs on the trolly from one end to the other (10m away) with a speed of `4m//s` relative to the trolly in a direction opposite to the trolly's motion and jumps out of the trolly. How much has teh trolly moved from the time the child begins to run ?

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Convert the speed of the trolley from km/h to m/s
The speed of the trolley is given as 36 km/h. We can convert this to meters per second using the conversion factor \( \frac{5}{18} \).

\[ \text{Speed of trolley} = 36 \, \text{km/h} \times \frac{5}{18} = 10 \, \text{m/s} \]
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