a motorcyclist jumps off a cliff inclined at 53.0 degrees over a river that is 40.0m wide. the far bank is 15.0m lower than the edge of the take off ramp. the river itself is 100m below the ramp. Ignore air resistance. What should his speed be at the top of the ramp to just make it to the edge of the far bank? given: theta = 53.0 deg. d = 40.0 m change(y) = 15.0 m I'm just not sure what equation of projectile motion to use. Time is not really a factor in this... and I am confused because the variable t is in all the equations and where I don't know initial velocity, it leaves me with two unknown variables. Can someone just point me in the right direction, help me figure out which equations to use. Thank you so much.