A 7 kg block hangs 1.2 m from the ground. It falls at an acceleration of 4.06 m/s^2. It strikes the ground and does not bounce. How long does it take the 7 kg block to hit the ground in s.

Gravity = 9.8 m/s^2

Thank you for the opportunity to help you with your question!

m = 7kg F=ma=w = 70N

h= 1.2 m

a= v/t

v=a*t

g = 9.8

h= v t+ 1/2gt^2

h= a* t^2 + 1/2g*t^2

1.2= t^2 ( a+1/2 g )

1.2= t^2 (4.06+ 1/2 * 9.8 )

t^2= 0.13

t= 0.36 sec

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