Question

Ram is driving a car with a speed of 36 km/hr. When he was 275m. distant from the railway in closing and he accelerates his car with 2m/s^2 , after 10 seconds he realized , it is risky so he applied brakes . What should be the minimum deceleration of the car so that the car stopped just before the crossing ?


Answer in explanation
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Answer 1

Answer:

It may not seem like much, but driving even a few kilometres per hour above the speed limit greatly increases the risk of an accident.

• Many of us cheat a little when driving. We figure that while the speed limit is 60 km/h the police won't pull us over if we sit on 65. So we happily let the speedo hover just above the speed limit, unaware that by so doing we are greatly magnifying our chances of crashing.

• Using data from actual road crashes, scientists at the University of Adelaide estimated the relative risk of a car becoming involved in a casualty crash—a car crash in which people are killed or hospitalised—for cars travelling at or above 60 km/h. They found that the risk approximately doubled for every 5 km/h above 60 km/h. Thus, a car travelling at 65 km/h was twice as likely to be involved in a casualty crash as one travelling at 60 km/h. For a car travelling at 70 km/h the risk increased fourfold. For speeds below 60 km/h the likelihood of a fatal crash can be expected to be correspondingly reduced.

Answer 2

Answer:

thank u for free points ☺️