SPS8C

If the net force acting on a stationary object is zero, then the object will (1 pt.)

• Decelerate at a steady rate of speed

• Accelerate in the direction of the strongest force

• Begin moving backwards

• Remain at rest.

Which of the following does not indicate velocity?

• 20 miles from Sandy Springs to Decatur

• 36 mi/h towards downtown Atlanta along Peachtree Street

• 22 ft/s SSE

• 82 km/h going from Georgia to Louisiana

The difference between speed and velocity is that velocity includes (1 pt.)

• Weight

• Direction

• Distance

• Time

Which of the following statements are true of inertia? List the two that apply. (2 pts.)

• Inertia is a force.

• Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity.

• All objects have inertia.

• A more massive object has more inertia than a less massive object.

A car accelerates at a rate of 3.0 m/s² after stopping at a red light. If the mass of the car is 3000 kg, what force does its engine exert?

• 1000 N

• 3000 N

• 0.05 N

• 9000 N

Tags

NGSS.MS-PS2-2

A roofer needs to get a stack of shingles onto a roof. Pulling the shingles up manually uses 1,549 N of force. The roofer decides that it would be easier to use a system of pulleys to raise the shingles. Using the pulleys, 446 N are required to lift the shingles. What is the mechanical advantage of the system of pulleys? Explain your answer. (12 pts.)

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A book is pushed a distance of 0.78 m by a force that gives the book an acceleration of 1.54 m/s². If 1.56 J of work is done on the book, what is the book’s mass? Explain your answer.

(12pts.)

Tags

NGSS.MS-PS2-2

The diagram represents a potato plant. Several plant structures are labeled.

What is the primary structure in the potato plant that converts light energy into chemical energy?

• leaves

• flower

• roots

• tuber

Tags

NGSS.MS-LS1-6

The diagram represents a potato plant. Several plant structures are labeled.

The main function of the potato plant’s stem is to

• absorb water

• produce potatoes

• produce seeds

• transport nutrients

The data table shows the years when Halley’s Comet was closest to the Sun, making it visible to observers on Earth. The reason that Halley’s Comet can be seen during specific years is that

• the orbit of Halley’s Comet is a perfect circle

• the orbit of Halley’s Comet is controlled by Earth’s gravity

• Halley’s Comet orbits Earth in a cyclic and predictable pattern

• Halley’s Comet orbits the Sun in a cyclic and predictable pattern

Tags

NGSS.MS-ESS1-1