Question

4. A stone is thrown vertically upwaed with a
velocity of 20 m/s. If there is no
resistance
then calculate:
(a) the maximum height reached by stone
(b) tolal time taken by store to return to it
original position​

Answer 1

Answer:

Explanation

max height=u²÷2g

                      =400÷2×10

                       =20 metres

total time=2u÷g

                =2×20÷10

                =4 sec