I Q3. A 5 kg ball of clay moving at 18 m/s undergoes a collision with a 4 kg ball of clay at rest. If the two balls stuck together as a result of the collision, what is the speed of the two balls after collision? Q4. Use conservation of total mechanical energy to compute the final velocity of an object with the mass 35 kg dropped from rest at some height 100 m just before it strikes the ground. Q5. A 90 Kg skydiver deaccelerates from 60 m/s to 10 m/s when the skydiver's parachute opens. What work is done on the skydiver by the parachute