A mass of 100 g is joined to one end of a mass less rod, 10 cm in length, which is pivoted around the opposite end. The rod is held vertical, having the mass at the top and released. The rod swings. Find out the speed of the mass at the moment that the rod is horizontal?
i) 0.71 m/s
ii) 4.0 m/s
iii) 2.0 m/s
iv) 1.4 m/s
v) 2.8 m/s