Chapter 7 - Laws of Motion and Momentum Flashcards

1
Q

What is the principle of conservation of momentum?

A

The principle of conservation of momentum says that total momentum of a closed system is equal before and after a collision

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2
Q

What is the formula for momentum?

A

P = m x v

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3
Q

What are the properties of a perfectly elastic collision?

A

Momentum is conserved
Total Energy is conserved
Total KE is conserved

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4
Q

What are the properties of an inelastic collision?

A

Momentum is conserved
Total Energy is conserved
Total KE is not conserved

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5
Q

What are the 4 types of interaction?

A

Gravitational
Electromagnetic
Strong Nuclear
Weak Nuclear

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6
Q

How can momentum be investigated in a school?

A

Velocity of each object is determined with a motion sensor and a laptop, light gates and a digital timer, ticker timers, or stopwatch to measure time taken to cover known distance

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7
Q

What is Newton’s Second Law of motion in terms of motion?

A

The resultant force acting on an object is directly proportional to the rate of change of its momentum in the same direction

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8
Q

What is the relationship between resultant force and rate of change of momentum?

A

Net force is directly proportional to the rate of change of momentumq

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9
Q

What is the formula for Newton’s second law of motion with momentum?

A

Force = Change in Power / Change in Time

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10
Q

What is the relationship between force and rate of change of momentum?

A

The resultant force acting on an object is directly proportional to the rate of change of its momentum, and is in the same direction

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11
Q

What is the formula for the force and rate of change of momentum?

A

Force = Change in Momentum / Change in Time

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12
Q

What is the impulse of a force?

A

Impulse of a force is defined as the product of force and the time for which this force acts on an object
Change in momentum

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13
Q

What is the formula for impulse?

A

Impulse = Force x Time

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14
Q

Where is the impulse on a force-time graph?

A

The impulse is the area under a force-time graph

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15
Q

How is momentum is conserved in collisions?

A

In collisions and interactions, linear momentum is conserved in all directions

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16
Q

How is momentum conserved in the x direction?

A

m1v0 = m1v1cos x1 + m2v2cos x2

17
Q

How is momentum conserved in the y direction?

A

0 = m1v1sin x1 + m2v2sin x2