Give numerical of each topic of ch3

1.	Give numerical of each topic of ch3
Answer» A motor car moving at a speed of 72 km/h cannot come to stop in less than 3.0 second while for truck this time interval is 5.0 second . On a highway, the car is behind the truck both moving 72 km/h. The truck gives a signal that it is going to stop at an emergancy. At what distance the car should be from the truck so that it does not bump onto the truck? Human response time is 0.5 second.

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