1
Moment of force = Force × Perpendicular distance from pivot
2
Sum of clockwise moments = Sum of anticlockwise moments
3
Moment of couple = F × d
FORMULA CHAPTER
Chapter 01 – Force
ICSEClass 10Physics3 formulas
Complete ICSE Class 10 Chapter 01 Force formulas covering moments, torque, equilibrium and centre of gravity for Board exam preparation.
View
Moment of a Force
Moment of force = Force × Perpendicular distance from pivot
SymbolMeaningUnit
Mmoment of forceN m
FforceN
dperpendicular distance from pivotm
Worked example
Question: Using Moment of a Force, solve the case where a 20 N force acts 0.5 m from a pivot.
Calculation: Apply the Moment of a Force formula.
Step 1: Substitute the stated values into the formula.
Step 2: moment = 10 N m.
Answer: moment = 10 N m.
Principle of Moments
Sum of clockwise moments = Sum of anticlockwise moments
SymbolMeaningUnit
Mcwsum of clockwise momentsN m
Macwsum of anticlockwise momentsN m
Worked example
Question: Using Principle of Moments, solve the case where 10 N at 0.4 m balances 20 N at 0.2 m because both moments are 4 N m..
Calculation: Apply the Principle of Moments formula.
Step 1: Substitute the stated values into the formula.
Step 2: 10 N at 0.4 m balances 20 N at 0.2 m because both moments are 4 N m.
Answer: 10 N at 0.4 m balances 20 N at 0.2 m because both moments are 4 N m.
Moment of a Couple
Moment of couple = F × d
SymbolMeaningUnit
FEither forceN
dCouple armm
Worked example
Question: Using Moment of a Couple, solve the case where f = 10 N, d = 0.4 m.
Calculation: Apply the Moment of a Couple formula.
Step 1: Substitute the stated values into the formula.
Step 2: Moment = 10 × 0.4.
Answer: 4 N m.