Question

A ball is thrown vertically upwards 40 metres per second : calculate the greatest height attained and its velocity after 3 seconds


plz don't post irrelevant answer​

Answer 1

Answer:

80m,10m/s

Explanation:

u=40m/s

v2=u2-2gh

at highest point v=o

u2=2gh

h=40*40/2*10

h=80m

velocity after 3sec

v=u-gt

v=40-10(3)

=40-30

v=10m/s