Georgia Physical Science

A rocket is traveling through the atmosphere at a constant velocity. Which of the following is true?

• The rocket's engine is producing an unbalanced force that keeps the rocket in the air.

• All the forces acting on the rocket are balanced

• The rocket exerts a greater force on its exhaust gases than the gases exert on the rocket

• The rocket is moving, so some net force must be acting on it

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NGSS.MS-PS2-2

Two objects move away from each other. What happens to the gravitational attraction between them?

• It decreases

• It increases

• It becomes zero

• It does not change

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NGSS.MS-PS2-4

If an object falls far enough, it will reach terminal velocity. At this velocity, the force of air resistance is equal to the force of gravity on the object. The forces on the falling object are balanced. What will happen to the object and why?

• The object will accelerate toward the ground because gravity is pulling on it

• The object will hover in midair because the forces on it are balanced

• The object will fall at a constant velocity because the forces on it are balanced

• The object will decelerate until it reaches a full stop at the ground

Tags

NGSS.MS-PS2-4

Which of the following is evidence that a magnetic field surrounds a magnet?

• When a paper clip is placed on a bar magnet, it sticks to the magnet

• When the north poles of two magnets are brought near each other, they push apart without touching

• When a magnet is placed on a metal surface, it sticks to the surface.

• When you touch a metal doorknob, sometimes you receive a shock

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

S8P5abc A magnet sticks to a table leg. Based on this information, which material could the table leg be made of?

• iron

• wood

• copper

• aluminum

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NGSS.MS-PS2-3

Which material could be used for the core of an electromagnet?

• a wooden rod

• a vial of water

• a plastic rod

• a nickel rod

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NGSS.MS-PS2-3

S8P5ac An engineer built a device. The main part of the device is a bicycle attached by wires to a light bulb. When the engineer pedals the bicycle, the light bulb lights up. How can the device best be classified?

• as a motor

• as a generator

• as an electromagnet

• as an armature

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NGSS.MS-PS3-5

A student built a simple fan using an electromagnet, a permanent magnet, and a fan blade. When she connects the electromagnet to a single dry-cell battery, the fan blade turns. How would the student's fan most likely change if she connected it to two dry-cell batteries?

• The fan blade would turn faster

• The fan blade would turn slower

• The fan would turn in the opposite direction

• The fan would not turn at all

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NGSS.MS-PS3-5

NGSS.MS-PS2-2

Four objects are on a shelf 1.5 meters above the ground: a 350 gram trophy, a 100 gram picture frame, a 225 gram book, and a 600 gram vase. Which object has the most potential energy?

• book

• vase

• trophy

• picture frame

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NGSS.MS-PS2-4

NGSS.MS-PS3-2

Which of the following is a form of potential energy?

• sound energy

• chemical energy

• thermal energy

• mechanical energy

Tags

NGSS.MS-PS3-2