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

i'm thinking more like energy

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6