A seismograph is used to detect earthquake tremors. Why does its frame shake with the ground while the…
A seismograph is used to detect earthquake tremors. Why does its frame shake with the ground while the suspended heavy central mass remains nearly stationary?
The heavy mass is attracted by magnetic forces
The mass possesses inertia, resisting sudden movement
The mass is filled with light helium gas
Electric current passes through the pen mechanism
Solution
Due to the property of inertia, a heavy suspended mass resists sudden motion when the ground and frame tremble during an earthquake.