Question

1.A 70-kg diver jumps off a 9.7-m tower.
(a) Find the diver's velocity when he hits the water. ____m/s
(b) The diver comes to a stop 2.0 m below the surface. Find the netforce exerted by the water. __N

2.A 4530-kg helicopter accelerates upward at 2.1 m/s2. What liftforce is exerted by the air on the propellers?___ N

3.A 1.0-kg mass (mA) and a 6.0-kg mass (mB) are attached to alightweight cord that passes over a frictionless pulley. Thehanging masses are free to move. Find the acceleration of thelarger mass.
___m/s2 (downward)