Need help on this

Question

If the job from the table height is 0.402 seconds how high was the table

Answer 1

If I understand the question correctly you mean that it took .402 seconds to fall from the table?

There is one equation from kinematics that relates displacement and time traveling of a moving object, which is d=v_i t+1/2 a t^2, where d is displacement, v_i is initial velocity, and a is acceleration. If the object is dropped from rest, its initial velocity is zero. The acceleration is the acceleration due to gravity, which is a=-9.8 m/s^2. Then you would just need to substitute these values, with t=.402 s, to find the displacement d. The answer will be negative since the object is going down, but the absolute value of the displacement gives the height of the table.