Question

U
A ball is thrown vertically upwards with a velocity
v and an initial kinetic energy E. When half way
to the top of its flight, it can have velocity and
kinetic energy respectively of:

(1)v/2,E/2
(2)v/√2,E/2
(3)v/4,E/2
(4)v/4,E/√2​

Answer 1

Answer:

option b)

.

please mark me as brain least

Explanation:

half way up you have gained half of the height so you have gained half potential energy

so E= E/2

subbing into this relationship E2=E/2

1/2 mv2=1/2mv2/2

v2=v2/2

square both side give answer