Option B: Engineering Physics

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10 Terms

1
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Torque

Torque measures the rotational effect of a force acting on an object. Calculation:τ=r×F, where r is the moment arm and F is the force.

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Moment of Inertia

Moment of inertia (I) resists rotational acceleration. Calculation:I=∑miri^2. It depends on mass distribution relative to the axis of rotation.

3
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Rotational Equilibrium

Rotational equilibrium occurs when the net torque acting on an object is zero, keeping it stationary or rotating at a constant angular velocity.

4
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Angular Acceleration

Angular acceleration (α) describes how quickly the rotational speed of an object changes over time. Calculation:α= Δω/Δt.

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Equations of Rotational Motion

Equations describe the relationship between angular displacement, velocities, acceleration, and time for rotating objects.

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Newton’s Second Law for Angular Motion

Net torque is proportional to the rate of change of angular momentum. τ=Iα.

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Conservation of Angular Momentum

Total angular momentum remains constant when no external torques act. L_initial = L_final.

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Rotational Kinetic Energy

Energy associated with the rotational motion of an object. Calculation:KErot = (Âœ)Iω^2.

9
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First Law of Thermodynamics

Energy is conserved, and it can only change forms in an isolated system. Q=ΔU+W.

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Second Law of Thermodynamics

Total entropy tends to increase over time in an isolated system, leading to higher disorder.