Question

a ball is dropped from a cliff.find its speed 2 seconds after it is dropped, find its speed when it has fallen through 50 meter ,find the time taken in falling through 50 Meter take g=10ms_2

Answer 1

a = g = 10m/s^2
t1 = 2s
t2 = ?
v1= ?
V2 = ?
u = 0m/s
s=h=50m

g=v-u/t
v= gt = 10*2 = 20m/s          --------------------------- (1)



2gh= v^2
2*10*50= v^2
v^2 = 1000
v  = 10 root 10 m/s.   ------------------------(2)

Answer 2

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