Question

A mass m is allowed to fall on a pedestal fixed on the top of a vertical spring. If the height of the mass was H from the pedestal and the compression of the spring is d then the spring's force factor is given by

• A.
• B. $2 \mathrm { Mg } \frac { ( \mathrm { H } - \mathrm { d } ) } { \mathrm { d } ^ { 2 } }$
• C.
• D. 2 Mg

Answer 1

Answer: (D)

2 Mg

Answer 2

Note $\frac { 1 } { 2 }$kd² = mg(H + d)

or k =