24. A truck is moving forward at a constant speed of 21m/s. the driver sees...

24. A truck is moving forward at a constant speed of 21m/s. the driver sees a stationary car directly ahead at a distance of 110m. after a “reation time” of Δt, he applies the brakes, which gives the truck an acceleration of -3m/s^2(a) what is the maximum allowable Δt to avoid a collision, and what distance will the truck have moved before the brakes take hold?(b) assuming a recation time 1.4s, how far behind the car will the truck stop, and in how many seconds from the time the driver first saw the car?

In Physics
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Asked by tosingold on 25th August, 2018