Question

A truck travelling at 54 km/h slows down to 36 km/h in 10 sec. Find the
retardation.​

Answer 1

Answer:

Retardation=1/2 metre per second square

Explanation:

GIVEN

u= 54 km/hl(initial velocity)=15m/s

v=36 km/h(final velocity)=10m/s

t=10 sec(time)

TO FIND-retardation(.-a)

FINDIG

According to first equation of motion

v=u+at

10m/s=15m/s+a*10s

-5m/s*s=a*10s

-1/2m/s*s=a

so, -a=1/2m/s*s

so, retardation=1/2 metre per second square