Unit 4 Quiz #1 Impulse Momentum Review

What is momentum?

• The force applied to an object

• The product of an object's mass and velocity

• The energy stored in an object

• The rate of change of velocity

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What is the equation for momentum?

• p = mv

• p = ma

• p = m/v

• p = v/m

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What are the units for momentum?

• Newtons

• Joules

• Kilogram meters per second

• Meters per second squared

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Why is momentum a vector quantity?

• It has only magnitude

• It has both magnitude and direction

• It is a scalar quantity

• It is independent of direction

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How does momentum change in relation to its mass?

• Inversely proportional

• Directly proportional

• Not related

• Exponentially proportional

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Is it possible for a small object to be harder to stop than a massive object? Why does this make the concept of momentum important?

• Yes, because momentum depends on both mass and velocity.

• No, because only mass determines how hard it is to stop an object.

• Yes, because small objects have more inertia.

• No, because velocity is not a factor in stopping an object.

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Why is it not enough to just compare how fast two objects are moving (i.e., their velocity) to determine which one is harder to stop?

• Because velocity alone does not account for mass.

• Because velocity is the only factor in momentum.

• Because velocity is irrelevant in physics.

• Because velocity is the same for all objects.

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Why is it not enough to just compare how much mass two objects have (i.e., their mass) to determine which one is harder to stop?

• Because inertia does not include velocity.

• Because inertia is the only factor in momentum.

• Because inertia is irrelevant in physics.

• Because inertia is the same for all objects.

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Why must you compare the momentum (mass x velocity) of two objects if you really want to determine which one is harder to stop?

• Because momentum includes both mass and velocity.

• Because momentum is only about mass.

• Because momentum is only about velocity.

• Because momentum is irrelevant in physics.

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NGSS.HS-PS2-2

If a 7 kg bowling ball is rolling down a ramp at a velocity of +5 m/s, what is its momentum?

• 35 kg·m/s

• 12 kg·m/s

• 50 kg·m/s

• 7 kg·m/s

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