[(a)] Which one has the mechanical advantage less than one?
[(b)] State the principle of a lever.
[(c)] The mechanical advantage of a lever is 2. If the length of its effort arm is 1 m, calculate the length of the load arm.
OR Crowbar can be used as a lever.
[(a)] What do you mean by a lever?
[(b)] Among Effort, Load, and Fulcrum, state which one comes in the middle for a second order lever and for a third order lever.
[(c)] A metre scale is suspended in equilibrium position. If a weight of 60 g is suspended at a distance of 25 cm from the balanced point, what weight must be suspended on the other side at a distance of 30 cm to keep the metre scale in equilibrium?
Official Solution
Correct Option:
(1)
(A) (a) Mechanical advantage less than 1 Concept:
Mechanical advantage (MA) less than 1 occurs in third-class levers. Answer: (b) Principle of a lever Principle:(c) Calculation of load arm Step 1: Formula}}
Step 2: Given}}
Step 3: Calculation}}
Conclusion (c):(B) (a) Definition of lever A lever is a rigid bar that rotates about a fixed point called the fulcrum to lift or move a load. (b) Position in levers
Second order lever → Load is in the middle
Third order lever → Effort is in the middle
(c) Equilibrium of metre scale Step 1: Apply principle of moments}}
Step 2: Given}}
Step 3: Calculation}}
Conclusion (c):
02
PYQ 2026
medium
physicsID: kerala-s
A load of is lifted with a wheel and axle system that has a wheel of radius and an axle of radius .
[(a)] Calculate the mechanical advantage of this wheel and axle.
[(b)] How should a wheel and axle be designed to obtain increased mechanical advantage?
Official Solution
Correct Option:
(1)
Concept: Wheel and Axle
Mechanical advantage (MA) of a wheel and axle is given by:
(a) Calculation of Mechanical Advantage Step 1: Given data} Step 2: Apply formula} Conclusion (a):(b) Increasing Mechanical Advantage Step 1: From formula} Step 2: Ways to increase MA}
Increase the radius of the wheel ( )
Decrease the radius of the axle ( )
Conclusion (b):
About Work Energy And Power - KERALA-SSLC-EXAM
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