Akangaroo can jump over an object 2.46 m high. (a) calculate its vertical speed (in m/s) when it leaves the ground.
m/s
(b) how long (in s) is it in the air?

a) 6.95 m/s

b) 1.42 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

a) The vertical speed when it leaves the ground. is 6.95 m/s

Time taken to reach the maximum height is 0.71 seconds

Time taken to reach the ground from the maximum height is 0.71 seconds

b) Time it stayed in the air is 0.71+0.71 = 1.42 seconds

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

moisture is lackin, and organic acids are scarce.