Question

An object is dropped from cliff fall with a constant accelerations of 10m/s2.find its speed 2s after it was drop

Answer 1

u=intial velocity=0{since it is dropped from a cliff}
t= 2sec
acc. =10m/s²(gravity)
using first equation of motion
v=u+at
v= 0+10*2
v= 10*2 = 10m/s