Question

A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 32 ft/s2. What is the distance covered before the car comes to a stop? (Round your answer to one decimal place.)?

Answer 1

`84.0ft`, rounded to one decimal place

Explanation:

Applicable Kinematic equation is
`v^2-u^2=2as`
where `v, u, a and s` are final velocity, initial velocity, deceleration and distance covered respectively.

Now, `50mphxx(1760xx3)/3600=73.3333fps`
Inserting given and calculated values

`0^2-73.3333^2=2(-32)s`
`=>s=73.3333^2/64`
`s=84.0ft`, rounded to one decimal place