Question

A cyclist driving at 90 km/h is slowed down to 36 km/h in 5 sec. Calculate retardation
1) -3 m/s^2
2) 3 m/s^2
3) -10.8 m/s^2
4) 10.8 m/s^2

Answer 1

HEYA ❤️

ANSWER :

1). -3 m/s²

EXPLANATION :

INITIAL VELOCITY (u) = 90 km/h = 25 m/s

FINAL VELOCITY (v) = 36 km/h = 10 m/s

time (t) = 5 seconds

we know that,

a=(v-u)/t.....(i)

hence put the above values in (i).

a=(10-25)/5

a=-15/5

a=-3 m/s² (required answer)

HOPE IT HELPS ❤️