A car was moving at speed of 90km/h. On seeing a baby 20 m ahead on the road, the driver jammed on the brakes & it came to rest at distance of 15m.What is its retardation & how long does it take to come at rest?
Answers
Answered by
50
Answer:
v = 0
u = 90 km/hr = 25m/s
s = 15 m
a = ?
by using third equation of motion
v² = u² + 2as
0² = 25² + 2(a)15
0 = 625 + 30a
-625 = 30a
a = -625/30
a = - 20.84 m/s² (approx)
Explanation:
by putting the values in formula it is very easy
Answered by
6
Answer:
Explanation:
uy
Similar questions