Abead slides without friction around a loop_the_loop (see figure below). the bead is released from rest at a height h = 3.80r.

what is its speed at point a? (use the following as necessary: the acceleration due to gravity g, and r.)
v=__

how large is the normal force on the bead at point a if its mass is 4.10 grams?
magnitude=__
direction=downward

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)