5. A 4.0 kg object initially at rest explodes into 3 unequal fragments. A 1.2 kg chunk flies off at 15 m/s 30 N of W and a 0.9 kg chunk moves at 18 m/s 10 E of N. Find the magnitude and direction of the velocity of the final piece. (A) pg. 5 USCA ACADEMY SPH4U FINAL EXAM 6. Find the electric potential at point P. Show all work. 12 4 m UC -6.0 3 m 30 UC 3 m -8.0 UC 7. A 66 kg skateboarder jumps The Great Wall of China. At the peak of his jump he is 18 m high and travelling at 12 m/s. Assuming he started at rest, find his initial height