A body is coming with a velocity of 72 km/h on a rough horizontal surface of coefficient of friction 0.5. If the acceleration due to gravity is , find the minimum distance it can be stopped.
Block pressed against wall by force . Find incorrect statement.
1
friction force = mg
2
3
does not apply torque
4
does not apply torque
Official Solution
Correct Option:
(4)
Concept:
Torque depends on line of action of force. Step 1: Check forces
Normal force acts at wall can produce torque Step 2: Incorrect statement
Saying produces no torque is wrong Conclusion: (D)
03
PYQ 2014
medium
physicsID: met-2014
A body rests on smooth surface. Body placed over has coefficient of friction . Find force required to just move .
1
2
3
4
It will not slide
Official Solution
Correct Option:
(1)
Concept:
Maximum static friction:
Step 1: Normal force
Step 2: Maximum friction
Step 3: System acceleration
Total mass For limiting condition:
But effective force acting only on :
Conclusion:
04
PYQ 2015
medium
physicsID: met-2015
A block of mass is lying on the edge having inclination angle . Wedge is moving with a constant acceleration ms . The minimum value of coefficient of friction , so that remains stationary with respect to wedge is
1
2
3
4
Official Solution
Correct Option:
(2)
Step 1: Understanding the Concept:
\begin{itemize}
\item In non-inertial frame of wedge:
\begin{itemize}
\item Pseudo-force acts horizontally backward on block
\end{itemize}
\end{itemize} Step 2: Detailed Explanation:
\begin{itemize}
\item Normal reaction:
\item Friction:
\item Therefore:
\item Simplifying:
\item Substituting values:
\end{itemize} Step 3: Final Answer:
Minimum coefficient of friction .
About Friction - MET
Friction is a vital chapter for MET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Friction PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Friction carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
