Q. The moving parts of a machine which weigh 1 tonne perform vertical simple harmonic motion with an amplitude of 2.5 cm and a period of 0.5 sec. The base of the machine weighs 3 tonnes and rests on the ground. Maximum reactions on the ground would be

• (A) 5 metres
• (B) 4.25 metre
• (C) 0.5 metre
• (D) 1 metre