Question

Aakar travelled at a velocity of 54 km per hour is brought to rest by 3 seconds. calculate its retardation​

Answer 1

Answer:

convert the speed into m/s by multiplying it by 5/18 the apply v=u+at and put v=0 as it come to rest

then by solving you will get a=-5 m/s2

Answer 2

Answer:

a= ∆v/∆t and a=v2-v1/3 here V2 is zero and v1 is 54km/hr (15m/sec) ,a=0-15/3 then a is -5m/sec^2