Rankers Physics

Torque: Practice Problem & Solution

An equilateral prism of mass m rests on a rough horizontal surface with coefficient of friction μ. A horizontal force F is applied on the prism as shown in the figure. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is : Torque diagram: An equilateral prism of mass m rests on
mg/√3
mg/4
μmg/√3
3mg/4

Solution Explained:

To solve this problem, we apply the core principles of Torque. Understanding the underlying formula is key to arriving at the correct answer below:

Toppling will take place about right most point so,

F ×(√3a/2) = mg × a/2

⇒ F= mg/√3

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