Question

A pebble is dropped freely from the top of the building and it reaches the ground in 4 sec taking g=10m/sec2 calculate the height of the building​

Answer 1

Answer:

2+2-4+6*8/42*58+444*5/10

Answer 2

Given, a=g=10m/s2

t=4s

u=0m/s        {Initial velocity at rest}

So, height= ut+21at2

=(0)(u)+21(10)(16)

=80m

∴ Height of the tower= 80m .