Momentum and Spin Quiz

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Momentum and spin basics.

Dew Physics

United Arab Emirates

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Momentum and Spin Quiz


Momentum and Spin QuizVersion en ligne Momentum and spin basics. par Dew Physics 1 Which quantity is conserved in a closed system with no external torque? a Total energy b Momentum change c Kinetic energy d Total angular momentum 2 For a rotating rigid body, L equals what product? a L = Iω b L = F × r c L = mv d L = mr 3 If a skater pulls arms in, what happens to angular velocity ω? a ω becomes zero b ω decreases c ω increases d ω stays the same 4 In a torque-free motion, what is conserved? a Moment of inertia b Angular momentum c Angular velocity d Torque 5 What happens to angular momentum during a head-on collision with no external torques? a Total angular momentum is conserved b Momentum is irrelevant c Total energy is conserved only d Angular momentum increases 6 If a wheel spins faster but moves slower linearly, which is conserved in pure rotation about its center? a Torque b Linear momentum c Angular momentum about the center d Kinetic energy 7 Which expresses linear momentum p? a p = mgh b p = r × v c p = F × t d p = mv 8 Which action changes angular momentum without external torque? a Internal redistribution of mass b Applying external force c Friction with ground d Changing gravity 9 What does the conservation of momentum apply to in collisions? a Potential energy only b Total momentum of the system c Kinetic energy only d Momentum of a single object