hey!!
A car driver driving at a speed of 90 km/hr applies brakes and brings the car to rest in 20 sec. The cceleration of the car is-
1. †1ms²
2. 1.5ms²
3. 1.25ms²
4. 2.5ms²
Answers
Answered by
3
Answer:
u = 90km/hr = 90 × 5/18 = 25 m/s
v = 0
t = 20 sec
a = v - u / t
= 0 - 25/20
= -5/4 m/s^2 = -1.25 m/s^2
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Answered by
0
Answer:
-1.25m/s²
Explanation:
speed is given in km/hr.
Convert it into m/sec by mutipying with 5/18.
90*5/18 = 25
By using,
v= u + at
0= 25+ 20a
a = -25/20
a = -1.25 m/s²
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