A particle , starting from point A in the drawing , is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height 4.00 m of 4.00 m above the floor before falling back 3.00 m down . Ignoring friction and air resistance , find the speed of the particle at point A. (3) Water slide H (4) The drawing shows a version of the loop -the -loop trick for a small car. If the car is given an initial speed of 4.0 m/s, what is the largest value that the radius + can have if the car is to remain r in contact with the circular track at all times? 4.0 m/s A person starts from rest at the top of a large frictionless spherical surface , and slides into the water below (see the drawing). At what angle 0 does the person leave the surface