A physics book slides off a horizontal table top with a speed of 1.60m/s . It strikes the floor after a time of 0.440s . Ignore air resistance.(adsbygoogle = window.adsbygoogle || []).push({});

the following are given:

v(0)=1.60

t= 0.440s

ok this is the question

Find the height of the table top above the floor. Take free fall acceleration to be g=9.80m/s^2 .

i need to use this formula:

x(t) = x(0) + v(0)t + 1/2at^2 <-- height formula

the thing is why is v(0)t equal to zero? isnt the v(0) given in the problem? i know the correct answer and i know how the book done it, but they dont explain why v(0)t is equal to zero.

x(0) = 0 + 1/2(-9.8m/s^2)(.440s)^2 <--- i dont get why v(0) is zero

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# Homework Help: Physics book slides off a horizontal

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