[Class 11th - Physics - Laws of Motion - MERIT YARD]

[Class 11 - Laws of Motion]

Question 1 / 40Inertia depends on:

A) Velocity

B) Mass

C) Volume

D) Area

Question 2 / 40The SI unit of Force is:

A) Joule

B) Watt

C) Newton

D) Pascal

Question 3 / 40Force is defined as the rate of change of:

A) Mass

B) Velocity

C) Momentum

D) Energy

Question 4 / 40Newton's First Law is also known as:

A) Law of Conservation

B) Law of Gravity

C) Law of Inertia

D) Law of Momentum

Question 5 / 40Which formula represents Newton's Second Law?

A) F = ma

B) F = mv

C) F = m/a

D) F = m²a

Question 6 / 40Action and Reaction forces are always:

A) Unequal

B) In same direction

C) Equal and Opposite

D) Perpendicular

Question 7 / 40Linear Momentum (p) is the product of:

A) Mass and Acceleration

B) Mass and Velocity

C) Force and Time

D) Mass and Force

Question 8 / 40When a bus stops suddenly, passengers fall forward due to:

A) Inertia of Rest

B) Inertia of Motion

C) Inertia of Direction

D) Gravitational Force

Question 9 / 40Recoil of a gun is an application of:

A) Conservation of Energy

B) Conservation of Mass

C) Conservation of Linear Momentum

D) Conservation of Charge

Question 10 / 401 Newton is equal to how many Dynes?

A) 10³

B) 10⁴

C) 10⁵

D) 10⁶

Question 11 / 40Impulse is defined as:

A) Rate of change of momentum

B) Force × Time

C) Mass × Time

D) Force × Velocity

Question 12 / 40Rocket propulsion works on the principle of:

A) Newton's 1st Law

B) Conservation of Energy

C) Conservation of Momentum

D) Boyle's Law

Question 13 / 40Friction always acts in a direction:

A) Same as motion

B) Perpendicular to motion

C) Opposite to relative motion

D) Downwards

Question 14 / 40Static friction is:

A) Constant

B) Always zero

C) Self-adjusting

D) Equal to applied force always

Question 15 / 40Which friction is the smallest?

A) Static Friction

B) Limiting Friction

C) Kinetic Friction

D) Rolling Friction

Question 16 / 40If the net external force on a body is zero, its acceleration is:

A) 10 m/s²

B) Maximum

C) Zero

D) Infinite

Question 17 / 40The force required to keep a body moving in a circle is:

A) Gravitational Force

B) Centripetal Force

C) Centrifugal Force

D) Frictional Force

Question 18 / 40Formula for Centripetal Force is:

A) mv/r

B) mr

C) mv²/r

D) m/r²

Question 19 / 40Weight of a body of mass 'm' is:

A) m

B) m/g

C) mg

D) m+g

Question 20 / 40Swimming is possible due to:

A) Newton's 1st Law

B) Newton's 2nd Law

C) Newton's 3rd Law

D) Law of Gravitation

Question 21 / 40Dimensional formula of Force is:

A) [MLT⁻¹]

B) [MLT⁻²]

C) [ML²T⁻²]

D) [M⁰LT⁻²]

Question 22 / 40Why do we use ball bearings in machines?

A) To increase friction

B) To reduce area

C) To reduce friction

D) To increase weight

Question 23 / 40Action and Reaction act on:

A) Same body

B) Different bodies

C) No body

D) Vacuum

Question 24 / 40Maximum value of static friction is called:

A) Kinetic Friction

B) Limiting Friction

C) Rolling Friction

D) Fluid Friction

Question 25 / 40Area under Force-Time graph gives:

A) Work

B) Power

C) Impulse

D) Acceleration

Question 26 / 40When a carpet is beaten with a stick, dust comes out due to:

A) Inertia of Rest

B) Inertia of Motion

C) Inertia of Direction

D) Friction

Question 27 / 40A cricketer pulls his hands back while catching to:

A) Increase Force

B) Decrease Force

C) Increase Momentum

D) Decrease Time

Question 28 / 40Momentum is a ________ quantity.

A) Scalar

B) Vector

C) Fundamental

D) Dimensionless

Question 29 / 40Force required to keep a body moving with constant velocity on a frictionless surface is:

A) mg

B) ma

C) Zero

D) Infinite

Question 30 / 40Apparent weight of a body in a freely falling lift is:

A) mg

B) 2mg

C) Zero

D) m(g+a)

Question 31 / 40Mass is a measure of:

A) Weight

B) Inertia

C) Force

D) Volume

Question 32 / 40Banking of roads is done to provide:

A) Gravitational Force

B) Centripetal Force

C) Frictional Force only

D) Speed

Question 33 / 40Coefficient of friction depends on:

A) Area of contact

B) Nature of surfaces

C) Speed

D) Weight

Question 34 / 40Which law gives the definition of Force?

A) First Law

B) Second Law

C) Third Law

D) Law of Gravity

Question 35 / 40Which law gives the magnitude (formula) of Force?

A) First Law

B) Second Law

C) Third Law

D) None

Question 36 / 40It is easier to pull a lawn roller than to push it because:

A) Mass decreases

B) Normal reaction decreases

C) Friction increases

D) Normal reaction increases

Question 37 / 40A man presses the earth while walking. The earth pushes the man with:

A) Less force

B) Equal and opposite force

C) Greater force

D) Zero force

Question 38 / 40The unit of Impulse is same as that of:

A) Force

B) Energy

C) Momentum

D) Power

Question 39 / 40If velocity is doubled, momentum becomes:

A) 2 times

B) 4 times

C) Same

D) Half

Question 40 / 40Angle of Friction is equal to:

A) Angle of Projection

B) Angle of Repose

C) 90 degrees

D) 45 degrees

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