Question

Brakes are applied to a car traveling at 30m/ sec. Its velocity is reduced to 20m/sec in 5 sec. Calculate the distance covered by it. *​

Answer 1

Answer:

The car covers 125m in 5 sec

Answer 2

Answer:

$initial \: velocity \: = u = 30m {s}^{ - 2} \\ final \: velocit = v = 20m {s}^{ - 2} \\ and \: time = 5sec \\ accesalation = \frac{v - u}{t} \\ = (20 - 30) \div 5 \\ = - 2 \: m {s}^{ - 2} \\ {v}^{2} - {u}^{2} = 2ad \\ {20}^{2} - {30}^{2} = 2 \times ( - 2) \times d \\ - 500 = - 4d \\ d = \frac{ - 500}{ - 4} \\ = 125 \: metre$