PSC NCFE Review Part 1

The graph represents the motion of a cart. How does the speed of the cart compare when t=6 s and t=12 s?

• The speed of the cart at 6 s is greater than when time equals 12 s.
• The speed of the cart at 6 s is less than when time equals 12 s.
• The speed of the cart is 0.5 m/s at 6 s and 12 s.
• The speed of the cart is 2 m/s at 6 s and 12 s

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NGSS.MS-PS3-1

The chart represents the change in velocity for four different trains. If it took 5.38 s to reach the final velocity, which train had the greatest acceleration?

• W
• X
• Y
• Z

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NGSS.HS-PS2-1

Why does a flat piece of notebook paper take longer to reach the ground than an identical piece of notebook paper crumpled into a ball?

• The flat piece of paper has more mass.
• The crumpled piece of paper has more mass.
• The frictional force of air has more effect on the falling flat piece of paper.
• The frictional force of air has more effect on the falling crumpled piece of paper.

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NGSS.MS-PS2-2

Why does the weight of an object change with increasing elevation on Earth?

• The mass of the object decreases with higher elevation.
• The force of gravity acting on the object increases with higher elevation.
• The force of gravity acting on the object decreases with higher elevation.
• The mass of the object increases with higher elevation.

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NGSS.HS-PS2-1

NGSS.HS-PS2-4

Which type of friction occurs when an eraser is rubbed across a sheet of paper?

• static
• sliding
• rolling
• fluid

Two students pull on the opposite ends of a rope, but neither student is able to move the other. Which statement best explains why neither student is moved?

• They each pull on the rope with the same amount of force, so the net force is zero.
• They each exert the same amount of friction against the ground, so the net friction is zero.
• Their forces are not balanced, but gravity keeps them from moving.
• The two students have the same mass.

Tags

NGSS.MS-PS2-1

The diagram shows a board on top of two bricks with a cylinder on top of the board. The board exerts an upward force of 50 N. Which best explains this situation?

• The board has a weight of 50 N.
• The cylinder has a weight of 50 N.
• The combined weight of the two bricks is 50 N.
• The combined weight of the bricks, board, and cylinder is 50 N.

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NGSS.MS-PS2-4

Which is an example of a mixture?

• iron filings
• copper wire
• bronze pipe
• titanium plate

An element located at Group 18 and Period 4 would be classified as which type of substance?

• a halogen
• a metalloid
• a lanthanoid
• a nonmetal

The chart shows the density of five gases. A gas has a volume of 4.52 L. If its mass is 8.05 g, what is the identity of the gas?

• helium
• neon
• argon
• krypton