Question

A car is moving at 10m/s when the brakes are applied and it comes to rest in 5 s. What is the retardation produced.

Pls answer

Answer 1

Answer:

x=10t  

0<t5sec for t=5sec,

x1=50m

0=10−a(10−5)⇒a=2m/s2

x−x1=10(t−5)−12a(t−5)2(5<t<10)

⇒x=50+10t−50−t2−25+10t

x=−t2+20t−25

at t=10,x2=75m for t>10sec

x = 75 m`.

Explanation:

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Answer 2

Answer:

$-2m/s^2$

Explanation:

given,

u = 10m/s

v = 0m/s

t = 5s

we know, a = (v-u)/t = -10/5 = -2m/s^2

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