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1 6 momentum

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问题

True or False? Momentum is a scalar quantity. (Extended Tier Only)

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闪卡 1

问题

True or False? Momentum is a scalar quantity. (Extended Tier Only)

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答案

False. Momentum is a vector quantity as it has both magnitude and direction.

闪卡 2

问题

Define momentum. (Extended Tier Only)

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答案

Momentum is the product of an object's mass and velocity. It is a vector quantity, denoted by the symbol , and measured in kilogram meters per second (kg m/s).

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问题

True or False? An object at rest has momentum. (Extended Tier Only)

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答案

False. An object at rest has zero velocity, so zero momentum.

闪卡 4

问题

What is the equation of momentum? (Extended Tier Only)

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答案

The equation of momentum is Where:

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问题

How does momentum affect an object's motion? (Extended Tier Only)

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答案

Momentum keeps an object moving in the same direction, making it resistant to changes in direction, especially for objects with large momentum.

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问题

True or False? Momentum can be either positive or negative. (Extended Tier Only)

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答案

True. Momentum can be either positive or negative because it is a vector quantity.

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问题

What are the three conditions under which the momentum of an object will change? (Extended Tier Only)

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答案

The three conditions under which the momentum of an object will change are:

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问题

What is the principle of conservation of momentum? (Extended Tier Only)

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答案

The principle of conservation of momentum states that in a closed system, the total momentum before an event equals the total momentum after the event.

闪卡 9

问题

True or False? The conservation of momentum applies only to single objects. (Extended Tier Only)

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答案

False. The conservation of momentum applies to systems of objects, which can include one or multiple objects, as long as the system is closed.

闪卡 10

问题

What is a closed system in the context of momentum? (Extended Tier Only)

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答案

A closed system in the context of momentum refers to a system in which the total momentum remains constant, and no external forces are acting on the system.

闪卡 11

问题

State the condition for momentum to be conserved in a collision. (Extended Tier Only)

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答案

Momentum is conserved in a collision if the system is closed, meaning there is no net external force acting on it, and energy within the system remains constant.

闪卡 12

问题

True or False? In the absence of external forces, momentum is always conserved in a collision over time. (Extended Tier Only)

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答案

True. In the absence of external forces, the momentum of a collision is a conserved quantity, meaning it remains constant over time.

闪卡 13

问题

Define impulse. (Extended Tier Only)

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答案

Impulse is the product of force and the time duration for which it acts.

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问题

True or False? Impulse is equal to force divided by change in time. (Extended Tier Only)

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答案

False. Impulse is equal to force multiplied by the change in time ().

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问题

True or False? Force and impulse are the same concepts. (Extended Tier Only)

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答案

False. Force and impulse are different concepts:

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问题

What is the equation for calculating impulse? (Extended Tier Only)

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答案

The equation for calculating impulse is Where:

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问题

What is the relationship between impulse and change in momentum? (Extended Tier Only)

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答案

Impulse is equal to the change in momentum () of an object.

闪卡 18

问题

Define force in terms of momentum. (Extended Tier Only)

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答案

Force is the rate of change of momentum on a body.

闪卡 19

问题

How do you calculate the change in momentum of an object? (Extended Tier Only)

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答案

The change in momentum of an object is calculated by:

闪卡 20

问题

State the equation for force in terms of momentum. (Extended Tier Only)

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答案

The equation for force in terms of momentum is Where:

闪卡 21

问题

True or False? Force can be expressed as the change in velocity over time. (Extended Tier Only)

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答案

False. Acceleration is expressed as the change in velocity over time. Force can be expressed as the change in momentum divided by the change in time.