Kinetic Energy questions (1 Viewer)

[clintmyster]

I have these questions which im stumped on..help would be appreciated. Just 9d) and 10a) and b)

edit: worked out the answers myself

 

[Arowana21]

9d- use projectile motion equations

10a- use centripetal force equation mvsquared/r
10b- since u find part (a) then u can use that speed and substitute in KE equation