Physics Unit 4 Blitz

An object with positive charge will _____ an object with negative charge.

• repel

• increase

• decrease

• attract

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NGSS.MS-PS2-3

If you know the car's potential energy and its kinetic energy, you can determine its mechanical energy through the formula ______.

• ME = KE + PE

• KE = 1/2 mv²

• F₁d₁ = F₂d₂

• PE_g = mgh

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The fact that the force times the distance on one side of  a lever's fulcrum equals the force times the distance on the other side of the fulcrum, is represented in the _____.

• Law of Moments

• Law of Conservation of Mass

• Law of Motion

• Law of Conservation of Energy

A universal force that pulls every other object in the universe is ______.

• levity

• equilibirium

• gravitation

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NGSS.MS-PS2-4

During the filming of a movie, a car sits atop a cliff edge. To be able to get the car to move from the cliff, the workers had to pry the car with a long bar set upon a fulcrum, in other words, they used a(n) _____.

• fulcrum

• effort arm

• lever

• resistance arm

Two objects with like electrical charges, such as positive and positive or negative and a negative, will _____ each other.

• increase

• decrease

• attract

• repel

Identify the machine

• Wheel and axle system

• lever system

• inclined plane system

• pulley system

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During the filming of a movie, a car is pushed off the cliff. To calculate the car's kinetic energy at any point during the fall you would use this formula _____.

• KE = 1/2mv²

• PE_elastic = 1/2kx²

• PE_g = mgh

• KE_i + PE_i = KE_f + PE_f

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During the filming of a movie, a car near the edge of a cliff. It has _____ energy due to the height it is from the bottom of the cliff.

• potential

• kinetic

• mechanical

• ineria

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A machine receives electricity that enables it to deliver a total of 8,542 N of force for the completion of its task. The machine's useful output is 7,023 N. What is the machine's efficiency?

• 90%

• 82%

• 74%

• 32%

Tags

NGSS.MS-PS3-5