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Define: (i) stopping distance of a vehicle (ii) reaction time during a free fall. |
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Answer» Solution :(i) Let at a certain moment the brakes are applied on a vehile running on a road. If the vehicle then travels a distance x until it comes to rest then x is called the stopping distance of the vehicle. (II) Many natural events demand immediate ACTION from the observers. An observer an event, registers it in his BRAIN and then takes the required action. The time spent between the first observation and the action taken is called his/her reaction time. For EXAMPLE suppose an observer sees an object falling freely from the ceilling of a room towards a glass plate kept on a table. He/she would try either to intercept the falling object or to remove the plate from the table. In this CONTEXT if the reaction time is greater than the time of fall, then the glass would break. |
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