Answer:t=1.28 seconds
Step-by-step explanation:
The newton law of motion said
Force= mass × acceleration
The friction force said
a= u . g
a = 0.270 × 9.81
a=2.65m/s^2
Now applied the kinematics equation
v= u+ at
v=3.40 and u= 0
Now
t= 3.40/2.65
t=1.28 seconds