Question

A stone is drop from edge of a roof a) How long does it take to fall 4.9m ? b) How fast does it move at the end of fall ? c) what will be it's acceleration after 3 sec ? . ❤❤I'll mark the correct anwser as brainliest❤❤ _____love uhh________

Answer 1

Answer:

Given:

Initial speed =u = 0 m/s( free fall)

Time =t = 10 sec

a=g= 9.8m/ s2

Height = h = ?

Formula to be used:

Second equation of motion:

h= ut + 1/2at^2

h= 0xt+(1/2)×9.8 × 10x10

= 4.9 x 100

= 490m

Therefore the height of building is 490m.

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