Momentum, Impulse, Forces, and Power Quiz

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Key ideas in dynamics

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Joel Rodriguez

Honduras

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Momentum, Impulse, Forces, and Power Quiz


Momentum, Impulse, Forces, and Power QuizVersion en ligne Key ideas in dynamics par Joel Rodriguez 1 Is the amount of work done in a given amount of time a Power b Work c Momentum d 2 Is defined to be mass times velocity. a Power b Work c Momentum d 3 Is the product of a force and the time over which it acts a Power b Impulse c Momentum d 4 Forces can be Respuesta escrita 5 What is momentum in physics? a Energy transferred during motion b Impulse over time c p = mv (mass times velocity) d F = ma (force equals mass times acceleration) 6 What is the impulse equals change in momentum formula? a J = p² b J = Δp = FΔt c P = Fv d W = Fd 7 Which forces can change the total momentum of a system? a Gravity only b External forces c Centripetal forces d Internal forces 8 How is power defined in mechanics? a Power = impulse × time b Power = mass × acceleration c Power = momentum/velocity d Power = work rate = F·v or ΔW/Δt 9 If no external forces act on a system, what happens to the total momentum? a It increases b It is conserved c It decreases d It becomes zero 10 Which statement is true about impulse and momentum? a Impulse depends only on velocity b Impulse equals the change in momentum c Momentum equals force × time d Impulse equals energy 11 What happens to kinetic energy in a perfectly inelastic collision? a Kinetic energy always conserved b Momentum and energy both conserved exactly c Momentum not conserved d Momentum is conserved, kinetic energy not necessarily 12 What is the SI unit of power? a Joule (J) b Watt (W) c Pascal (Pa) d Newton (N) 13 Which scenario illustrates external forces changing momentum? a A free-falling object in space b A perfectly elastic wall bounce with no loss c A car brake applying force to slow it down d Two-skater push-off (internal) 14 A 2 kg cart moves at 3 m/s after an impulse; after a 1 N·s impulse, what is the new velocity? a 1.5 m/s b 4 m/s c 3 m/s d 3.5 m/s Explicación 5 Momentum is mass times velocity. 6 Impulse changes an object's momentum: Δp = ∫F dt. 7 Internal forces cancel out within the system; external forces change total momentum. 8 Power is the rate of doing work, equals F·v. 9 In absence of external forces, total momentum remains constant. 10 Impulse directly changes momentum by J = Δp. 11 Momentum is conserved in collisions; kinetic energy may decrease. 12 Power is measured in watts. 13 External forces (like brakes) change total momentum. 14 Final momentum p' = p + J = 6 + 1 = 7; v' = p'/m = 3.5 m/s.

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Momentum, Impulse, Forces, and Power Quiz

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À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Momentum, Impulse, Forces, and Power QuizVersion en ligne

par Joel Rodriguez

Is the amount of work done in a given amount of time

Is defined to be mass times velocity.

Is the product of a force and the time over which it acts

Forces can be

Respuesta escrita

What is momentum in physics?

What is the impulse equals change in momentum formula?

Which forces can change the total momentum of a system?

How is power defined in mechanics?

If no external forces act on a system, what happens to the total momentum?

Which statement is true about impulse and momentum?

What happens to kinetic energy in a perfectly inelastic collision?

What is the SI unit of power?

Which scenario illustrates external forces changing momentum?

A 2 kg cart moves at 3 m/s after an impulse; after a 1 N·s impulse, what is the new velocity?

Explicación