Question

51
Motion in a Straight line
24. A car travelling with a velocity of 80 km/h slowed down to 44 km/h in 15 s. The retardation is
(1) 0.67 m/s
(2) 1 m/s
(3) 125 m
/s2​

Answer 1

Answer:0.67

Explanation: a= v-u/t

Here v=44 km/h = 12.2 m/s

U= 80km/h =22.2m/s

a= 12.2 - 22.2 /15

=0.67

Answer 2

Answer:

The answer is 0.67 m/s2.

a=v-u/t.

v=80km/h.

u=44km/h.

t=15s.

80-44=36.

1km/h=5/18m/s.

36x5/18=10m/s.

10/15=0.67