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Jeopardy!

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Random Stuff

Blast from

the Past

Impulse

Universal G

Momentum

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Final Jeopardy

The equation for

Impulse, solved for

Force

What is F = J / t?

Danny, 55 kg, pushes Jason with a force

of magnitude 600N for 3 seconds.

This is the impulse delivered.

What is 1800 Ns?

A huge truck slams into a tiny VW.

The change in momentum of the

bug-truck system is equal to this.

What is bupkis?

As the magnitude of an unbalanced force

acting on an object increases, the rate of

change of its momentum does this.

What is increases?

A 5-kg cart with velocity of 4 m/s is brought

to a stop in 2 seconds. The magnitude of the

average force used to stop the cart is this.

What is 10 N?

It’s a “center-seeking” force or acceleration.

What is centripetal?

It’s how much the force of attraction

between two masses will decrease

If the distance between them is doubled.

What is one-quarter of the force?

This is how many different speedsa satellite may have and still remainin the same orbit.

What is one?

It’s how much the force of attraction

between two masses will increase

if both masses are doubled.

What is four times the force?

It’s how much the force of attraction

between two masses will increase

if the distance between masses is cut by one-third.

What is nine times the force?

The SI unit of momentumand the unit of impulse.(Provide both!)

What is kg m/s and N•s?

An unbalanced force of 25 N is appliedto Alice, 45 kg, for 10 seconds. The change in the magnitude of her momentum will be equal to this amount.

What is 250 kg m/s?

True or false:

The momentum vector always points

in the direction of the velocity vector.

What is true?

A 1000-kg “care package” is fired from a10,000-kg cannon. If the package leaves thebarrel of the cannon with a speed of 500 m/s,

this is the recoil speed of the cannon.

What is 50 m/s?

A 150-N force acts on a 250-kg objectin a direction due east for 10 seconds.

The object is on the planet Zorg, whereg=19.8 m/s2. This will be the change inmomentum on the object.

What is 1500 kg m/s due east?

What a Dum Dum becomes

right after you throw it.

What is a projectile

or an object in free fall?

The magnitude and direction of g.

What is 9.8 m/s2 downward or toward the

center of mass of Earth?

It’s the direction of a normal force.

What is perpendicular to the surface?

Bryan vectors 20m South, West 55m,

North 40m, and then East 55m,

so his displacement is this.

What is 20m to the North

or x=20m North.

The speed of a model airplane that has a

velocity of 12 m/s South with the wind

blowing on it at 5 m/s East.

What is 13 m/s?

Number of Ogres in a Megaogre.

What is 1,000,000 or 106?

Number of donkeys in a teradonkey.

What is 1,000,000,000,000 or 1012?

The approximate mass of Earth.

What is 6 x 1024 kg?

It’s what your home electricity meter measures.

What is energy, or kiloWatt hours,

kWh?

The meaning of the Greek word “phusis”from which our modern word “physics”

is derived.

What is nature?

- Jessica, 55 kg, jogs at 4.0 m/s due West.
- Tyler, 85 kg, jogs at 3.0 m/s due East.
- This is the vector that describes their combined momentum.

What is 439 kg m/s @ 156o?