A delivery Is travelling at a constant speed of 15m/s in a 60 km.h speed zone when the driver seems people walking across a pedestrian crossing 50m ahead of him.the driver takes exactly one second to react before he applies brakes as hard as he can.it takes a further 3 seconds for the van to a stop.will the van stop before the pedestrian crossing?show all calculations.
Can i get help
To determine if the van will stop before reaching the pedestrian crossing, we need to calculate the distance it will travel during the driver's reaction time and the distance it will take to come to a complete stop.
First, let's calculate the distance covered during the driver's reaction time:
Distance = Speed × Time
The speed of the van is given as 15 m/s and the reaction time is 1 second.
Distance = 15 m/s × 1 s = 15 m
Next, we'll calculate the total distance covered during the driver's reaction time and the braking time:
Total Distance = Distance covered during reaction time + Distance it takes to stop
Total Distance = 15 m + ? (the distance it takes to stop)
Now, let's calculate the distance it takes to stop:
In order to find the distance it takes to stop, we need to know the van's deceleration rate. Unfortunately, that information is not provided in the question.
To determine if the van will stop before the pedestrian crossing, we need to compare the total distance covered to the distance of the pedestrian crossing, which is given as 50 m. However, since we do not have the deceleration rate, we cannot accurately calculate the total distance covered.
Therefore, without the deceleration rate, we cannot determine if the van will stop before the pedestrian crossing.