Dropped objects hit the ground same time. Objects which are of point size with respect to Earth are attracted towards ground due to force of gravitation. Force of gravitation is given by formula F = G\frac{m_1m_E}{R^2}. When an object of mass m_1 is dropped means it has zero initial velocity. It...
Using a step down transformer 12 V can be cut down to 1.5 V. In a step down transformer number of turns in secondary windings is less than the number of turns in primary windings.