U5 - Momentum and Impulse Flashcards

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1
Q

Can you run from momentum?

A

No

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2
Q

What is the momentum equation

A

P = mv

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3
Q

What unit is momentum in

A

( kg x m ) / s

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4
Q

What is the Newton’s second law with momentum?

A

∑F = 𝚫P/𝚫T —– ∑F = mv_f - mv_i /𝚫T

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5
Q

What force does momentum measure?

A

The force during a collision

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6
Q

What is Impulse?

A
Impulse = 𝚫P
Impulse =  ∑F𝚫T
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7
Q

What regulates the amount of force in collisions?

A

The time that the collision takes.

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8
Q

What is impulse approximation?

A

It is the idea that in short time collisions, the force of impact will be much larger than the other forces.

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9
Q

During an impact is Fn = Impact force? T or F

A

True

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10
Q

Should you wear a helmet?

A

Yes

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11
Q

What is conservation of momentum

A

The idea the momentum is conserved during collisions and explosions

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12
Q

What is the conservation of momentum equation

A

∑p_i = ∑p_f

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13
Q

What is an inelastic collision

A

An inelastic collision is a collision where kinetic energy is not conserved due to deformation of shape that turns KE into thermal energy (Ball of clay hitting the ground)

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14
Q

What is an elastic collision

A

A collision that conserves kinetic energy and has a bounce off of two objects. (note: hard spheres are used as examples of elastic collisions, while in reality being inelastic)

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15
Q

What is a perfectly inelastic collision

A

A collision that has one object stick to the other

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