Reporting Category 2 CFA

Immediately after they push away from each other, how does the motion of the mother and daughter change?

• The mother moves forward, and the daughter moves backward with a greater acceleration.

• Both move forward, but the mother moves with a greater acceleration.

• The mother moves backward, and the daughter moves forward with a greater acceleration.

• Both move backward, but the daughter moves with a greater acceleration.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The net force on a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newtons. What is the mass of the vehicle to the nearest kilogram?

• 2700

• 1801.5

• 1200

• .0083

Tags

NGSS.MS-PS2-2

Which answer choice correctly describes the ball’s kinetic and potential energy?

• The ball has more potential energy at position X than at position Z.

• The ball has more kinetic energy at position Y than at position W.

• The potential energy and kinetic energy of the ball are equal at position X.

• The potential energy and kinetic energy of the ball are greatest at position Z.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

• There are no forces acting on the rock.

• The only force acting on the rock is directed toward the sidewalk.

• The forces acting on the rock are all balanced.

• The sidewalk exerts an unbalanced force on the rock.

The students most likely have which type of rock?

• Coal

• Dolomite

• Peridotite

• Sandstone

Which table best shows the average speed of the toy car at different time intervals?

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Tags

NGSS.MS-PS3-1

Which energy transformation happens when the blades are spinning as shown?

• Electrical to mechanical

• Chemical to electrical

• Mechanical to electrical

• Chemical to mechanical

Tags

NGSS.MS-PS3-5

Which answer choice best describes the movement of the object between the times of 0 and 6 seconds on the graph?

• Moving at a constant speed

• Moving toward the north

• Accelerating

• Stopped

Tags

NGSS.MS-PS3-1

The diagrams show forces acting on a toy car as it moves to the right.

Which diagram shows the toy car that will most likely accelerate to the right based on these conditions?

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Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A pitcher throws a ball toward a player holding a softball bat. The player uses the bat to hit the ball. The bat applies a 10-newton force to the ball. Which statement correctly describes the reaction force between the bat and ball?

• The reaction force is the force that causes the ball to move toward the bat.

• The reaction force is the force applied to the bat by the player holding the bat.

• The reaction force is the force that pulls the ball toward the ground.

• The reaction force is the force of the ball on the bat.

Tags

NGSS.MS-PS2-1